NTPC DLN Systems Vamsi[1]
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Transcript of NTPC DLN Systems Vamsi[1]
NTPC Workshop
Dry Low NOx (DLN) Systems
Vamsi Duraibabu
September 14, 2010HyderabadIndia
2© General Electric Company
© 2010 General Electric Company. All Rights Reserved. This material may not be copiedor distributed in whole or in part, without prior permission of the copyright owner.
Copyright 2010 General Electric Company. Proprietary.
All Rights Reserved. No part of this document may be reproduced,
transmitted, stored in a retrieval system nor translated into any human or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual, or otherwise, without the prior written permission of the General Electric Company.
GE Energy
3© General Electric Company
© 2010 General Electric Company. All Rights Reserved. This material may not be copiedor distributed in whole or in part, without prior permission of the copyright owner.
Emissions Technology AdvancementNO
x( p
pm )
Technology Enablers• 3D Reacting Flow
• Advanced Materials / Coatings
• Active Fuel Staging
• Smart GT Controls
‘85 ‘90 ‘10‘95
DLN +DLN +
DLN - Dry Low NOxDLN - Dry Low NOx
25 PPM25 PPM
Water InjectedWater Injected
42 PPM42 PPM
9 PPM9 PPM
15 PPM15 PPM
< 5 PPM< 5 PPM
Leader in Low Emissions Technology
4© General Electric Company
© 2010 General Electric Company. All Rights Reserved. This material may not be copiedor distributed in whole or in part, without prior permission of the copyright owner.
Dry Low NOx (DLN) Technology EvolutionNOx
CO
Stability
&
Premix
Range
Reliability
&
Component
Life
DLN 1.0
( 6B / 9E )
DLN 1.0+
( 7EA )
DLN 2.0
( 9FA )
DLN 2.6
( 6FA )
DLN 2.0+
( 9FA+e )
DLN 2.6+
( 9FB )
DLN Design
“ A Four
Sided Box ”
DLN Technology – 30 years of Design Evolution
5© General Electric Company
© 2010 General Electric Company. All Rights Reserved. This material may not be copiedor distributed in whole or in part, without prior permission of the copyright owner.
DLN Combustion System - Summary
1327
1411
1327
1327
1288
1135
Firing Temp ( oC )
9FA+e
9FBA
9FA+e
6FA+e
9FA
6B
9E
GT Model
40%
38%
30 mg/Nm3
30 mg/Nm34DLN 2.6+
60%50 mg/Nm33DLN 2.0+
50%30 mg/Nm34DLN 2.6
60%50 mg/Nm34DLN 2.0 #
65%
75%30 mg/Nm32DLN 1.0
Turndown * ( % GT Load )
Emission (NOx 15% O2)
No. of Fuel
Circuits
DLN Type
# Not Offered for New units
* ISO Day ( 15 oC , 60% RH )
6© General Electric Company
© 2010 General Electric Company. All Rights Reserved. This material may not be copiedor distributed in whole or in part, without prior permission of the copyright owner.
DLN 1.0 System – Frame 6B & 9E
• The original Dry Low NOx Combustion System, first fielded in early ’80’s.
• Operates in Diffusion mode, Piloted-premixed mode, and Fully premixed mode.
• Can be retrofitted on to existing turbines to replace Diffusion flame combustors
• Second largest single-digit NOx DLN fleet, behind the 7FA+e.
Lean Premixed System
FUEL STAGING
7© General Electric Company
© 2010 General Electric Company. All Rights Reserved. This material may not be copiedor distributed in whole or in part, without prior permission of the copyright owner.
DLN 2.0+ System - Frame 9FA+e
Premix
PM1
PM4PM4
PM4 PM4
DiffusionD5
D5
D5
D5
D5
Sub Piloted PremixD5
D5
D5
D5
D5
PM1
Piloted PremixD5
D5
D5
D5
D5
PM1
PM4
PM4PM4
PM4
Premix
PM1
PM4PM4
PM4 PM4
DiffusionD5
D5
D5
D5
D5
Sub Piloted PremixD5
D5
D5
D5
D5
PM1
Piloted PremixD5
D5
D5
D5
D5
PM1
PM4
PM4PM4
PM4
FUEL STAGING
Ignition - 95% Speed
95% Speed - 10% Load
10% - 50% Load
50% - 100% Load
• DLN-2+ retains the basic architecture of the DLN-2
• Fuel nozzle ( Swozzle Design ) redesigned with cleaner aerodynamics for improved Flame Holding Margin & Pressure drop.
• Accept fuels with wide wobbe Index ranging from 28 to 52.
Swirl-Stabilized Premixed System
8© General Electric Company
© 2010 General Electric Company. All Rights Reserved. This material may not be copiedor distributed in whole or in part, without prior permission of the copyright owner.
DLN 2.6+ System - Frame 9FA+e / 9FB
DiffusionD5
D5
D5
D5
D5D5
Sub Piloted PremixD5
D5
D5
D5
PM1D5
D5
Piloted PremixD5
D5
D5
D5
D5
PM3
PM3PM3
PM1
Sub Premix
PM3
PM3PM3
PM1
D5
Premix
PM3
PM2
PM3PM3
PM1PM2
DiffusionD5
D5
D5
D5
D5D5
Sub Piloted PremixD5
D5
D5
D5
PM1D5
D5
Piloted PremixD5
D5
D5
D5
D5
PM3
PM3PM3
PM1
Sub Premix
PM3
PM3PM3
PM1
D5
Premix
PM3
PM2
PM3PM3
PM1PM2
DiffusionD5
D5
D5
D5
D5D5
Sub Piloted PremixD5
D5
D5
D5
PM1D5
D5
Piloted PremixD5
D5
D5
D5
D5
PM3
PM3PM3
PM1
Sub Premix
PM3
PM3PM3
PM1
D5
Premix
PM3
PM2
PM3PM3
PM1PM2
Ignition - 95% Speed
95% Speed - 20% Load
FUEL STAGING
20% - 30% Load
30% - 40% Load
40% - 100% Load
• Based on the DLN 2+ fuel nozzle with DLN 2.6 architecture
• Designed for Sub 9 ppm NOx / CO Emissions
• Fuel Staging Flexibility – Solution for Yellow plume
• New Unit or Retrofit
Advanced Swirl-stabilized System
9© General Electric Company
© 2010 General Electric Company. All Rights Reserved. This material may not be copiedor distributed in whole or in part, without prior permission of the copyright owner.
DLN2.6+ System w/ OpFlex AutoTuneModel Based Control Technology Applications
Fuel flexibility• Wobbe index variation• Eliminates combustion retuning requirement
Performance enhancement• Output & efficiency• Fuel Supply pressure reduction
Start-up fuel flexibility•Larger start up fuel variances
Start-up emissions improvements• Lower start up NOx
+_+_
+_+_
+_+_
+_+_
+_+_
+_+_
+_+_
+_+_
+_+_
Lo
op
S
ele
cti
on
S
tru
ctu
re
ARES - Parameter
Estimation
Engine Model
Virtual
Sensors
Sensors
Effectors
Physics-Based Boundary Models
Lim
it S
ch
ed
uli
ng
CDM
• Direct boundary control
• Accommodates deterioration
• Tuning schedules are adjusted
automatically
Key Features
10© General Electric Company
© 2010 General Electric Company. All Rights Reserved. This material may not be copiedor distributed in whole or in part, without prior permission of the copyright owner.
Gas Turbine Combustion Laboratory
• 10 Test stands for testing and validating all DLN Systems
• Capability of blending NG with H2, CO, CO2, N2 and Steam
• Advanced monitoring and diagnostic instrumentation (upto 400 sensors) for component validation
• Up to 230 High Pressure / High Temperature Tests conducted per year
World Class DLN Combustor Test Facility
Camera–Premixed Flame
Overview
Appendix
12© General Electric Company
© 2010 General Electric Company. All Rights Reserved. This material may not be copiedor distributed in whole or in part, without prior permission of the copyright owner.
DLN 2.6+ System - Frame 9FA/FA+e /FB
Super B
Thermal
Barrier
Coating
(TBC)
Extended Interval (EI) transition
piece cooling and sealing
DLN 2.6 style nozzle
arrangement (5+1)
Fuel flexibility retained
from DLN 2+
� 9FA+e (9351FA)� 20/20 mg/Nm3 NOx/CO to 50% load� 30/30 mg/Nm3 NOx/CO to 35% load1
� 24k combustion interval
� 9FA (9311FA)� 30/30 mg/Nm3 NOx/CO to 50% load� 24k combustion interval
� 9FB (9371FA)� 30/12.5 mg/Nm3 NOx/CO to 38% load� 12k combustion interval
� 9FA+e (9351FA)� 20/20 mg/Nm3 NOx/CO to 50% load� 30/30 mg/Nm3 NOx/CO to 35% load1
� 24k combustion interval
� 9FA (9311FA)� 30/30 mg/Nm3 NOx/CO to 50% load� 24k combustion interval
� 9FB (9371FA)� 30/12.5 mg/Nm3 NOx/CO to 38% load� 12k combustion interval
� 9FA+e launch in 2005(12 operating, 7 ordered)
� 9FB launch in 2007(18 operating, 32 ordered)
� 9FA (9311FA) launch in 2009(1 operating, 4 ordered)
� Dual fuel and wide wobbe capable
� 9FA+e launch in 2005(12 operating, 7 ordered)
� 9FB launch in 2007(18 operating, 32 ordered)
� 9FA (9311FA) launch in 2009(1 operating, 4 ordered)
� Dual fuel and wide wobbe capable
1 With OpFlex Extended Turndown software
13© General Electric Company
© 2010 General Electric Company. All Rights Reserved. This material may not be copiedor distributed in whole or in part, without prior permission of the copyright owner.
+_
Sensors
Effectors
Control
Control Schedules
+_+_
Sensors
Effectors
Control
Control Schedules
+_+_
+_+_
+_+_
+_+_
+_+_
+_+_
+_+_
+_+_
+_+_
Lo
op
S
ele
cti
on
S
tru
ctu
re
ARES - ParameterEstimation
Engine Model
Virtual
Sensors
Sensors
Effectors
Physics-Based Boundary Models
Lim
it S
ch
ed
ulin
g
CDM
Good: Schedule-Based• Indirect boundary control• No explicit deterioration accommodation
• Coupled effectors
Better: Model-Based• Direct boundary control
• Accommodates deterioration
• De-coupled effectors
A different control paradigm