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Gas turbine with improved part load emissions behavior

A gas turbine and turbine technology, which is used in gas turbine devices, fuel control of turbine/propulsion devices, exhaust devices, etc., can solve problems such as high CO emissions, and achieve the effects of low CO emissions and reduced CO2 emissions.

Active Publication Date: 2015-02-25
ANSALDO ENERGIA SWITZERLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the aforementioned known operating concepts at low part loads, especially in the range of about 20% to 50% relative load, can lead to high CO (carbon monoxide) emissions

Method used

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  • Gas turbine with improved part load emissions behavior
  • Gas turbine with improved part load emissions behavior
  • Gas turbine with improved part load emissions behavior

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Embodiment Construction

[0080] figure 1 A sequential combustion gas turbine that can be used to practice the methods described herein is shown. The gas turbine comprises a compressor 1 , a first combustor 4 , a first turbine 7 , a second combustor 15 and a second turbine 12 . Typically, it comprises a generator 19 coupled to the shaft 18 of the gas turbine at the cold end of the gas turbine, that is to say at the compressor 1 .

[0081] Fuel, gas or oil is introduced into the first burner 4 via a fuel feed 5 , mixed with air, which is compressed in the compressor 1 , and combusted. The hot gas 6 is partially expanded in the subsequent first turbine 7, performing the work.

[0082] As soon as the second burner is running due to increased load, additional fuel is added to the partially expanded gas 8 in the burner 9 of the second burner 15 via the fuel feed 10 and in the second burner 15 combustion. The hot gas 11 is expanded in the subsequent second turbine 12, performing the work. The exhaust ga...

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Abstract

In a method for the low-CO emissions part load operation of a gas turbine with sequential combustion, the opening of the row of variable compressor inlet guide vanes (14) is controlled depending on the temperatures of the operative burners (9) of the second combustor (15) and simultaneously the number of operative burners is kept at a minimum. This leads to low CO emissions at partial load of the gas turbine.

Description

technical field [0001] The present disclosure relates to methods for operating gas turbines with sequential combustion and low CO emissions. Background technique [0002] Sequential combustion gas turbines have been in successful commercial operation for some time today. In them, compressed air is combusted with fuel in a first combustor, and a first turbine (called the high-pressure turbine) is exposed to the incoming hot gases. The temperature of the hot gases exiting the high pressure turbine increases again in the second combustor due to refueling and its combustion, and the second turbine (called the low pressure turbine) is exposed to these incoming hot gases. [0003] Compared to conventional gas turbines with only one burner, they feature an additional degree of freedom to control the fuel of the first and second burner separately. In addition, this offers the possibility of first operating only the first burner and only engaging the second burner at higher loads. ...

Claims

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Application Information

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IPC IPC(8): F02C7/22F02C9/26
CPCF05D2270/303F23N2041/20F02C7/228F02C6/003F23N2037/02F02C7/22F23R3/346F02C9/20F05D2270/112F01N3/18F05D2270/08F02C9/28F23N1/022F23N5/022F23N2225/08F23N2237/02F23N2241/20F23R2900/03341
Inventor T. 弗雷拉-普罗维达基斯G. 辛格拉T. 米尤维斯森S. 里帕里O. 玛格丽
Owner ANSALDO ENERGIA SWITZERLAND AG
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