Your SlideShare is downloading. ×
0
Dln2+ combustion
Dln2+ combustion
Dln2+ combustion
Dln2+ combustion
Dln2+ combustion
Dln2+ combustion
Dln2+ combustion
Dln2+ combustion
Dln2+ combustion
Dln2+ combustion
Dln2+ combustion
Dln2+ combustion
Dln2+ combustion
Dln2+ combustion
Dln2+ combustion
Dln2+ combustion
Dln2+ combustion
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Dln2+ combustion

1,182

Published on

1 Comment
0 Likes
Statistics
Notes
  • Be the first to like this

No Downloads
Views
Total Views
1,182
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
101
Comments
1
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide
  • <number>
  • <number>
  • Transcript

    • 1. Wha t I Co m bus tio n s A RAPID EXOTHERMIC PROCESS WHICH ? WILL DELIVER HIGH TEMPERATURE PRODUCTS Wha t I AFla m e ? s THE ZONE WHICH SEPARATES THE REACTANTS AND THE PRODUCTS, AND WHERE THE TEMPERATURE RISE OCCURS
    • 2. Fla m e Ca te g o riz a tio n (Definitions) FLAMES PREMIXED FLAME (Blue) LAMINAR FLAME TURBULENT FLAME • SPARK IGNITION ENGINE • OXY-ACETYLENE WELDING TORCH • DRY LOW NOX (DLN 2.6) DIFFUSION FLAME (Yellow & Sooty) LAMINAR FLAME • • • • • TURBULENT FLAME CANDLE FLAME GAS RANGE DIESEL ENGINE ALL FURNACES CONVENTIONAL GAS TURBINE (Standard, MNQC)
    • 3. Diffus io n fla m e O2 Fam l e fron t O2 O2 fuel fuel wick fuel fuel O2
    • 4. Pre m ix e d fla m e P ixed rem flow O 2 O2 zone CH4 +O2 -> O2 CH4 O2 F e lam O 2 CH4 O 2 CO + O2 -> CO2 CH2 + O2 -> CO + OH O 2 O 2 CO + O2 -> CO2 O2 CH4 +O2 -> O2 O 2 O 2 CH2 + OH + CO O 2 O2 P flam zone ost e CH2 + OH + CO CH4 O2 O 2 O 2 CO + O2 -> CO2 O2
    • 5. Diffus io n Vs . Diffusion > Very Robust d Pre m ix eStable Flame > Typically Operable Over a 2000°F Temp. Rise Range > High NOx Emissions Without Diluent > Low CO Emissions Premixed > Very Narrow Operating Window > Typically Operable Over a 200-300°F Temp. Rise Range > Can Achieve Very Low NOx Emissions Without Diluent > Low CO Emissions Can Be Difficult
    • 6. Fuel Nozzle Burner Swirl Nozzle Pressure Ratio Fuel-Air Profile Diffusion Purge Burner Velocity Flame Stability Cap Airflow Low Emissions
    • 7. DLN 2+ Combustion System (9FA+e) Larger Nozzle Area for Lower BTU Fuels (5 Swozzles) Improved Cooling Liner for Increased Firing Temperature Advanced Materials Legend: DLN2+ DLN2+ EI 50% Turndown 25 ppm NOx 15 ppm CO Improved Impingement Cooled Transition Piece Improved Cooling Technology Advanced Thermal Barrier Coating Class C Super B Improved Mounting & Sealing
    • 8. FADLN Co m bus tio n Sy s te m Endcover: Contains Internal Passages to Route Fuel to Fuel Nozzles Liner: Contains Reacting Flow Flowsleeve: Provides Flow Conditioning and Controlled Cooling to Liner PCB Port: Transition Piece: Instrumentation Port for Connects Individual Dynamics Acquisition Cylindrical Combustion Chambers to Annular Turbine Inlet Fuel Nozzles Fuel Nozzles: Inject Fuel to Reaction Zone ReactionZone: Fast Reactions Complete. NOx Produced In Rich Pockets Prior to Mixing Completion Post Reaction Zone: Fast Reactions Complete. NOx Produced In Rich Pockets Prior to Mixing Completion
    • 9. FADLN Co m bus tio n Sy s te m Cast, Fully Faired Fuel Nozzles N-263 Liner Turbulated Backside Cooling Advanced Cooling on Liner Aft End Impingement Cooled Transition Piece Cloth Seals Effusion Cooled Bluff Body Cap Assembly Steam Injection Manifold For Power Augmentation
    • 10. DLN2+ Premixer Operation DLN2+ Premixer (9FA+e, 7/ 9FB, 9H, 6C, 52E) Swozzle approach to address flashback / flameholding Swirler and fuel nozzle Combined – “Swozzle” Swirl Stabilized Premixed Flame F/A mixture recirculates back into Hot pilot flame for flame stability Diffusion Fuel Diffusion Fuel Injection Anchors premixed flame in piloted Premixed mode Premixing Inlet Flow Conditioner - IFC Premix Fuel Diffusion Fuel Fuel Ports Swirler Vanes Diffusion Fuel Tip
    • 11. DLN2+ Combustion Systems (9FA+e) Diffusion: D5 Ignition  Diffusion flame on all 5 nozzles  PM1 and PM4 manifolds purged with air D5 D5 D5 D5 Diffusion D5 Sub Piloted Premix: D5 + PM1 95% Speed Piloted Premix: D5 + PM1 + PM4 D5 Sub Piloted Premix D5 PM1 8% Load  Diffusion flame on all 5 nozzles  Premix flame on PM1 and PM4 nozzles  Tune D5 and PM1 / PM4 split Premix: PM1 + PM4 D5 D5  Diffusion flame on all 5 nozzles  Premix flame on PM1 nozzle  PM4 manifold purged with air  Tune D5 / PM1 split D5 D5 PM4 D5 PM4 D5 PM4 D5 PM4 Piloted Premix D5 PM1 50% Load  Premix flame on PM1 and PM4 nozzles  D5 manifold purged with air  Tune PM1 / PM4 split PM4 PM4 PM4 PM4 PM1 Premix
    • 12. DLN2.6+ Combustion System DLN 2.6 Like “5 around 1 Nozzle Arrangement Product Capability 40% Turndown 9 ppm NOx 9 ppm CO Advance Thermal Barrier Coating Super B EI Transition Piece Cooling and Sealing
    • 13. Combustion Systems for Large Gas Turbines DLN 2.6 DLN 2+ DLN 2.6+ DLN 2+ 7FA+e / 7241 9FA+e / 9351 9FA+e DLN 2+ DLN 2.5 DLN 2.5 DLN 2.5 DLN 1 7FB / 7251 9FB / 9371 9H 6C 5-2E 7EA Number of Nozzles 6 5 6 4 5 5 5 5 7 Center Y/N Y N Y N N Y Y Y Y ISO Baseload T3.9 2664 2679 2664 2802 2794 2752 2680 2482 2176 T rise (deg F) 1910 1912 1898 2011 1999 1878 1858 1680 1506 ISO Baseload TCD NOx guarantee (ppmv@15%O2) 754 766 766 791 795 873 821 802 670 9 25 9* 25 25 25 15 15 9 Turndown range 40% 50% 40% 55% 50% 50% 40% 50% 70% Delta P (%) Heat Release per can (BTU/sec) 5.7% 6.3% 6.0% 6.5% 6.5% 6.2% 7.1% 6.2% 4.5% 31571 35385 36822 34146 38423 57206 18626 13533 24749 * Introduced at 15 ppm
    • 14. NOx at 15% O2 vs. P ercent L oad 7FA DLN 2.6 Emissions vs. GT Load 80 70 Mode 4 ISO NOx @ 15% ppmvd 60 Mode 1 50 40 Mode 3 30 20 10 Mode 6 0 0 10 20 30 40 50 60 % Gas Turbine Load 70 80 90 100
    • 15. Dynamics Dynamics W indow NOx Dynamics DLN Operability Limit Dynamics W indow NOx Guarantee NOx Fuel-Air Ratio Lean Blow Out Lean Window Blow Out Fuel-Air Ratio Operability W indow CO CO CO Tfire (Power) Fuel-Air Ratio W indow Guarantee Fuel-Air Ratio
    • 16. GT Operation with DLN (IGV Temperature Control) Traditional Simple-Cycle (Constant Air Flow) Overall F/ A Traditional Combined Cycle IGV Temperature Airflow Control • Inlet Guide Vanes throttle Air into Compressor • IGV start opening at ~50% load Load - MW Load - MW • Fuel Flow increases w/ Load Fuel Load - MW Overall F/ A Load - MW • F/A Maintained 50-100% Load • Combustor operates just above LBO condition • Ideal for Low NOx 50-100% Load when operated with inlet bleed heat (IBH) DLN Equipped Turbines in Simple Cycle Applications Typically Operate with IGV Temperature Control for Better Turndown
    • 17. Gas Fuel Systems … Structure and Hardware Filter Separator-Removes Knock-out Drum– Station – Reduces Pressure Reducing Removes Particulate and Performance HeaterSuperheats Fuel – To heat gas fuel when W MoisturizationIncreasesLiquid Slugsto ater Coalescing Filter – to Saturates the gas Removes liquids Fuel Compressor –Increases/Maintains or Gas Bath Heater – Water Bath Heater – gas fuel Liquids from Inletrate and Supply to Start-up Heater –Supply efficiency of the Expected theFuel and Regulates the Gas Fuel improve in heat toGas Compressormoisture to than that Preventwhen its (If of Liquids Across Formationheater insure upstream of start-up provided). fuel fuels superheat level when fuel pressure the to increase supply is lessheated to Levels and Limits Required by the Gas gas turbine cycle. Normally Pressure by the value. superheated fuel is liquid required. content/heating minimum free. required Reducing Valves supply is below Gas Turbine. Turbine. 365°F Gas Fuel Module Water Bath Heater Gas Company Knock-Out Drum Pressure Reducing Station Filter Separator Gas Compressor Performance Heater Fuel Moisturization Start-up Heater Coalescing Filter Gas Fuel Module Gas Fuel Scrubber D5 GCV Final Filtration Upstream of Gas Module GCV3 Aux Stop Valve Metering Tube Flow Indication to Mark VI Speed Ratio Valve GCV2 Strainer Protection of valves and fuel nozzles Applied on Heated Fuel Units Regulates Fuel Flow/Pressure . Isolates Fuel GCV1 “Splits” Fuel between different nozzles. Gas Manifold Gas Manifold Gas Manifold Gas Manifold Equally distributes flow between combustion cans. Combustion Can

    ×