NOx Reduction in Partially Premixed Flames by Flue Gas Recirculation

2014 ◽  
Author(s):  
Yaroslav Chudnovsky ◽  
Serguei Zelepouga ◽  
Alexei Saveliev ◽  
John Wagner ◽  
Vitaly Gnatenko
Keyword(s):  
Experimental Investigation ◽  
Flue Gas ◽  
Nox Reduction ◽  
Premixed Flames ◽  
Combustion System ◽  
Flue Gas Recirculation ◽  
Partially Premixed Flames ◽  
Partially Premixed ◽  
Burner Operation ◽  
Gas Recirculation

The authors are currently investigating new technical (both design and operation) approach, which is expected to enable the improvement of the performance of partially premixed type burners without jeopardizing the simplicity, cost, and reliability that this type of burners are well known for. The improvements include significant reduction of the NOx emission without substantial redesign of the combustion system. The results of the experimental investigation of burner operation and design improvements are to be presented and further discussed at the podium.

Flue Gas Recirculation of the Alstom Sequential Gas Turbine Combustor Tested at High Pressure

2011 ◽  
Author(s):  
Felix Guethe ◽  
Dragan Stankovic ◽  
Franklin Genin ◽  
Khawar Syed ◽  
Dieter Winkler
Keyword(s):  
High Pressure ◽  
Gas Turbine ◽  
Flue Gas ◽  
Operating Conditions ◽  
Limiting Factors ◽  
Combustion System ◽  
Flue Gas Recirculation ◽  
Wide Range ◽  
Gas Recirculation ◽  
The Impact

Concerning the efforts in reducing the impact of fossil fuel combustion on climate change for power production utilizing gas turbine engines Flue Gas Recirculation (FGR) in combination with post combustion carbon capture and storage (CCS) is one promising approach. In this technique part of the flue gas is recirculated and introduced back into the compressor inlet reducing the flue gas flow (to the CCS) and increasing CO2 concentrations. Therefore FGR has a direct impact on the efficiency and size of the CO2 capture plant, with significant impact on the total cost. However, operating a GT under depleted O2 and increased CO2 conditions extends the range of normal combustor experience into a new regime. High pressure combustion tests were performed on a full scale single burner reheat combustor high-pressure test rig. The impact of FGR on NOx and CO emissions is analyzed and discussed in this paper. While NOx emissions are reduced by FGR, CO emissions increase due to decreasing O2 content although the SEV reheat combustor could be operated without problem over a wide range of operating conditions and FGR. A mechanism uncommon for GTs is identified whereby CO emissions increase at very high FGR ratios as stoichiometric conditions are approached. The feasibility to operate Alstom’s reheat engine (GT24/GT26) under FGR conditions up to high FGR ratios is demonstrated. FGR can be seen as continuation of the sequential combustion system which already uses a combustor operating in vitiated air conditions. Particularly promising is the increased flexibility of the sequential combustion system allowing to address the limiting factors for FGR operation (stability and CO emissions) through separated combustion chambers.

Reduction of the flue gas recirculation rate in oxycoal processes by means of non-stoichiometric burner operation

Energy ◽  
2012 ◽  
Vol 45 (1) ◽  
pp. 117-124 ◽  
Author(s):  
Maximilian Blume ◽  
Jan-Peter Bohn ◽  
Adrian Goanta ◽  
Hartmut Spliethoff
Keyword(s):  
Flue Gas ◽  
Flue Gas Recirculation ◽  
Recirculation Rate ◽  
Burner Operation ◽  
Gas Recirculation

NOX reduction in a 40 t/h biomass fired grate boiler using internal flue gas recirculation technology

2018 ◽  
Vol 220 ◽  
pp. 962-973 ◽  
Author(s):  
Yaojie Tu ◽  
Anqi Zhou ◽  
Mingchen Xu ◽  
Wenming Yang ◽  
Keng Boon Siah ◽  
...  
Keyword(s):  
Flue Gas ◽  
Nox Reduction ◽  
Flue Gas Recirculation ◽  
Gas Recirculation
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