Dln Retrofit In Two Frame 7 Gas Turbines Rasgas Lng Company-qatar

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  DLN Retrofit in Two Frame 7 Gas TurbinesRasGas LNG Company-Qatar Presenters:Amr GadAtul DeshpandeRasGas, Qatar Turbo 41 - Houston TexasDate: 27 September, 2012  Contents ãSummary of the projectãDLN1 Fuel Staging & Operational ModesãProcess Compressors for RasGas Train 3ãRequirements for DLN retrofit for Gas TurbinesãProject MilestonesãProject OrganizationãProject Details & ResultsãChallenges & Lessons Learned  Summary of the project ãRegulations set by Ministry of Environment to achieve NOx emissionsof 25 ppm for such turbines.ãTwo retrofitted units are driving Mixed refrigerant and propane in the LNGrefrigeration cycle.ãProject engineered in years 2009-2010 and implementation done in year2011 successfully.ã1 st successful DLN retrofit for Frame 7EA Gas Turbines in an LNG train.  DLN1 Fuel Staging & Operational Modes Transfer Mode Diffusion Flame100% Secondary Fuel50% Load   Premixed Mode Premixed Flame / Diffusion Pilot81% Primary / 19% Secondary Fuel50% - 100% Load For IBH machinesor 80%-100% Load for machines without IBH F/AMixing   Lean-Lean Mode Diffusion Flame~60% Primary / 40% Secondary Fuel19% - 50% Load   Primary Mode Diffusion Flame100% Primary FuelIgnition - 19% Load   DiffusionDiffusionDiffusion/PremixDiff /PremixPremix Primary Zone Dual Purpose: 1. Low Load Diffusion Flame 2. High Load Premixing Chamber