Conventional Firing Systems for Future Power Plants

Conventional Firing Systems for Future Power Plants International Conference POWER PLANTS 2012 H. Brüggemann Zlatibor, Serbia, 30.10. – 02.11.2012 I...
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Conventional Firing Systems for Future Power Plants International Conference POWER PLANTS 2012 H. Brüggemann Zlatibor, Serbia, 30.10. – 02.11.2012

International Conference

POWER PLANTS 2012 from October 30th to November 2nd 2012 in Zlatibor, Serbia

„Conventional Firing Systems for Future Power Plants“ H. Brüggemann, ALSTOM Boiler Deutschland GmbH, Stuttgart T.-M. Marling, ALSTOM Boiler Deutschland GmbH, Stuttgart

Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 2 © ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

History ALSTOM Boiler Deutschland GmbH 1921 Foundation of KSG Kohlenscheidungs-Gesellschaft mbH in Nuremberg, from 1924 to 1949 residence of the company in Berlin, since 1949 in Stuttgart 1970 Foundation of EVT Energie-und Verfahrenstechnik GmbH in Stuttgart Owners: Walther, Hugo Stinnes, CE and MAN 1975 The power station activities from MAN Nuremberg are integrated, New Owners: MAN, Walther and CE 1989 GEC ALSTHOM becomes majorit share holder of EVT by acquiring all of the CE shares (Combustion Engineering) 1995 EVT is completely taken over by the GEC ALSTHOM group

1998 Change of name from GEC ALSTHOM to ALSTOM, EVT to ALSTOM Energy Systems 1999 Merger of the power station activities of ALSTOM and ABB  ABB ALSTOM Power, ALSTOM Energy Systems to ABB ALSTOM Power Combustion GmbH 2000 ALSTOM takes over all shares of ABB, change of company name to ALSTOM Power Boiler GmbH

2006 Sale of ALSTOM Industrial Boilers to AE & E 2007 Change of name to Alstom Power Systems GmbH (Head office in Mannheim, Branch Stuttgart) 2011 Change of name to ALSTOM Boiler Deutschland GmbH (Head office Stuttgart) Residence of the company: sinze 1949 Stuttgart, sinze 1989 Stuttgart-Obertürkheim Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 3

097 176px

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Agenda Introduction – What are the Challenges of Tomorrow?

State of the Art – What is achievable?

Options to Increase the Flexibility

Summary Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 4 © ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Agenda Introduction – What are the Challenges of Tomorrow?

State of the Art – What is achievable?

Options to Increase the Flexibility

Summary Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 5 © ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Introduction – Challenges of Tomorrow

Source: C. Ziems, H. Weber, S. Meinke, F. Gottelt, E. Hassel, J. Nocke, „Einfluss der EE auf die Netzstabilität und maximal mögliche Einspeisung von Wind- & Solarenergie (in Deutschland)“, „Power Plant Technology Forum“, Hannover Messe, 06.04.2011

Varying boundary conditions will change the use of conventional power plants in the future: No distinct baseload, middleload or peakload operation Power demand occasionally covered completely by unadjustable renewable power extremly developed variation of residual load Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 6

001 1284p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Introduction – Status Quo

PV- und Windstromeinspeisung im Netzgebiet von 50Hertz Transmission GmbH vom 01.10.2011 bis 31.03.2012 in MW. Gelbe Markierung: Zeiträume, in denen zusätzlich zu den herkömmlichen netzstabilisierenden Maßnahmen zu Einspeisereduzierungen aufgerufen werden musste, um eine weiterreichende kritische Netzsituation abzuwenden. Quelle: Bericht zum Zustand der leitungsgebundenen Energieversorgung im Winter 2011 / 2012, Bundesnetzagentur, 03. Mai 2012

Already today: Variability of Power from RE Compensation for Variability Interventions to stabilize Grid become necessary Departure from Nuclear Power Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 7

NEW Challenges for Conventional Power Plants 001 1285p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Agenda Introduction – What are the Challenges of Tomorrow?

State of the Art – What is achievable?

Options to Increase the Flexibility

Summary Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 8 © ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Requests for Conventional Power Plants Expectations of Conventional Power Plants Safe Supply

high availability reduced emissions high efficient

Environmental friendly careful use of ressources

Economical

maintainability flexibility

Compliant to the grid Lower technical min Load

The Conventional Power Plants need to cope with the increased requirements

Shorter Start-Up Time Faster Load Changes More Load Cycles

Wider Fuel Ranges Alternative Fuels

Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 9

001 1286p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Agenda Introduction – What are the Challenges of Tomorrow?

State of the Art – What is achievable?

Options to Increase the Flexibility

Summary Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 10 © ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Optimisation Conventional Firing Options Flexible Power Plants Optimisation of Conventional Firing

Process Optimisation

Implementation of Indirect Firing

Optimisation of Equipment Reduction of the shaft output (auxiliary power) on the example of a primary air (PA) fan (radial fan)

Optimisation Pressure Parts and Materials

Improvement of the part-load efficiency on the example of a primary air (PA) fan (radial fan)

Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 11

001 1289p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Agenda Introduction – What are the Challenges of Tomorrow?

State of the Art – What is achievable?

Options to Increase the Flexibility – Equipment Tuning

Summary Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 12 © ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Lignite Firing Arrangement with Compact Main Burner

Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 13

031 379p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Optimisation Conventional Power Plants for Lignite Min Load Reduction due to Process and Equipment Optimisation Full Load: 7 Mills

Min Load usually: 4 Mills Newly built Plants: 40 % Existing Plants: 50 %

Min Load after Optimisation: 3 Mills Newly built and Existing Plants: 35 % - 40 % Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 14

035 346p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Optimisation – Conventional Power Plants for Lignite – Reburning Firing System Reduction of min Load / Flame Stability for lowest Loads Fuel Range Extension 

Fuel Enrichment at Main Burners and Reburning Effect at Reburning Burner  Increased Flame Stability for lowest Loads

Furnace of a Lignite Fired Power Station Schwarze Pumpe with Reburning Schwarze Pumpe, 2 x 800 MW el, Germany Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 15

031 372p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Optimisation – Conventional Power Plants Load Range Extension for Lignite Min Load Reduction due to Process and Equipment Optimisation 7-Mills in Op.

Range Extension for Operation (increased Flexibility)

6-Mills in Operation

Usual Range for Operation 5-Mills in Operation

Reduced Min Load

4-Mills in Operation

3-Mills in Operation 30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

Life Steam Production [%] Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 16

033 296p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Optimised Systems – Lignite

Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 17

007 519p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Optimisation – Conventional Power Plants for Bituminous Coal Min Load Reduction due to Process and Equipment Optimisation Full Load: 4 Mills

Min Load usually: 2 Mills

Newly built Plants: 25 % Existing Plants: 40 % Min Load after Optimisation: 1 Mill Newly built and Existing Plants: 15 % - 20 % Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 18

030 202p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Optimisation – Conventional Power Plants Load Range Extension for Bituminous Coal Min Load Reduction due to Process and Equipment Optimisation

4-Mills in Operation

3-Mills in Operation Reduced Min Load 2-Mills in Operation Usual Load Range

1-Mill in Operation

10

15

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

Life Steam Production [%] Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 19

033 297p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Optimisation Tilting Burner for Bituminous Coal Min. Load Reduction / Part Load Stability Increased Part Load Efficiency

ALSTOM Tilting-Burner

Wai Gao Qiao, 1,000 MW el, China

Karlsruhe 8, 912 MW el, Germany



Increased Flexibility (Low Load Operation & Load Changes)



Increase of Efficiency



Compact Burners (Reliability, Cost)

Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 20

030 203p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Optimisation – Tilting Burner for Bituminous Coal down

-30 [°] -20 -10

10 [kg/s] 9 8 7

Δ RH Temperature = 17 K

6 0

RH Temperature [°C]

5

HP Temperature [°C]

4 +10

Low Load Operation 

Increase of Efficiency

+20

3 2 1

+30

up



Compact Burners



Stabilizing low Loads



Utilizing a wider Range of Operation

Δ Tilting burner + 16 °

Burner Tilting [%] RH Injection [kg/s]

0 11:25

Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 21

11:35

11:45

11:55

Time

030 204p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Change of Fuel – Fuel Flexibility 35 30

Enlarged Fuel Range for Imported Fuel

25

Ash [%]

Range of local Fuel

20 15

Conventinel Range of Bituminous Fuel

10 5 0 4

6

8

10

12

14

16

Moisture [%]

Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 22

18

20

22

24

26 058 301p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

in Operation

Duct Burner

Primary Air

Optimisation Options for Mills for Bituminous Coal

Source: REBURNFLAM Kanal-/Flächenbrenner; Pillard Feuerungen GmbH

Dynamic Classifier

Gas supply

Mill

Fuel Range Extension Fast Load Changes Fuel Range Extension

Booster fan

Fuel to Mill

Faster Start-Up Low Load Operation

Fuel Range Extension Source: ROTAMILL GmbH

Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 23

036 308p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Optimisation of Conventional Power Plants

Implementation of Independant Biomass System Cofiring of alternative Fuel (Biomass) Wall Air / Upper Air Fuel Nozzle Intermediate Air / Oilburner

Storage Silo

Fuel Nozzle Lower Air / Biomass Wall Air / Upper Air

Pneumatic Transport Lines

Screw Conveyors

Dedusting

Fuel Nozzle Intermediate Air / Oilburner Fuel Nozzle Lower Air

Compressed Air Supply

Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 24

008 750p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Optimisation of Conventional Power Plants Biomass Grate Co-Combustion of Biomass (Biomass)

Grate Firing System 

Bark Pieces



Woodchips



Sewage Sludge



Etc.

Coal Burner

Biomass Feed

Biomass Feed

Ash Extraction Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 25

Biomass Grate 030 205p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Agenda Introduction – What are the Challenges of Tomorrow?

State of the Art – What is achievable?

Options to Increase the Flexibility – Indirect Firing

Summary Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 26 © ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Optimisation of Conventional Firing Option for Dynamic Response Improvement Mill  Burner

Mill  PF Separator / Silo  Burner

Direct Firing System (Conventional)

(Partly) Indirect Firing System

Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 27

030 211p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Indirect Firing System Reduction of dynamic Response Delay Fast Load Changes

Reduction of dynamic Response Delay (Secondary Control) 

Grinding Process causes Delays due to Storage Capacity of Mill



Indirect Firing separation of Grinding and Storage



Significant Reduction of System Response Time Significant Improvement in dynamic Response Time L1

Indirect Firing: Load Ramps up to 10 % / min

Load

Conventinal Firing: Load Ramps up to 2 % - 5 % / min L0

t0

t1, Indirect Firing

t1, Conventional Firing

Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 28

Time 002 775p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Optimisation of Conventional Firing Lignite – Dried Lignite Firing Niederaußem K: 8 x 90 MWth

• Start-up/Support Firing • Operation since 2003

Dried Lignite Burner Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 29

Dried Lignite Storage Silo 031 374p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Optimisation of Conventional Firing Lignite and Bituminous Coals Ranges for flexible Operation

Optimised Firing System - Lignite

Optimised Firing System - Bituminous Coal

Indirect Firing System for Lignite and for Bituminous Coal

5

10

15

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

95

100

Life Steam Production [%] Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 30

033 298p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Low Loads and Start-Ups 

Low Load Operation – Improvement of Part Load Efficiencies – Reduction of Cooling and Parasitic Air Ingress – Stability of Firing – Utilisation of a wide Range of operation



Start-Up – Replacement of Expensive Start-Up Fuel by Main Fuel

Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 31 © ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Agenda Introduction – What are the Challenges of Tomorrow?

State of the Art – What is achievable?

Options to Increase the Flexibility – Part Load Efficiency

Summary Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 32 © ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Optimisation of Part Load Increased Part Load Efficiency Improvement of the part-load efficiency on the example of a primary air (PA) fan (radial fan)

 Today:

Efficiency with frequency converter

Efficiency of fans

Components were designed for Optimum in Efficiency for nominal Load.

Efficiency with inlet vane control

Silencer

 Future:

Intake

Dramatic reduction of operating Hours under full Load require Reconsideration of Design and Specification of Components.

Reduction of the shaft output (auxiliary power) on the example of a primary air (PA) fan (radial fan)

Shaft output (auxiliary power) of the fans

Optimisation of Components (Fans, Pumps, other Equipment) to achieve acceptable over all Efficiency.

PA-Fan

Total fan work

Shaft output with inlet vane control Shaft output with frequency converter

Total fan work

Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 33

061 014p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Agenda Introduction – What are the Challenges of Tomorrow?

State of the Art – What is achievable?

Options to Increase the Flexibility

Summary Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 34 © ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

State of the Art – What is feasible? State of the Art

Further Development

(Newly built and existing Plants)

2 - 6 Hours

1 - 4 Hours

Depending on Start-up Conditions

Depending on Start-up Conditions

Minimum Load Bituminous Coal

Newly built Plants: 25 % Existing Plants: 40 %

Conventional Firing 15 - 20 % Indirect Firing 10 % - 15 %

Minimum Load Lignite

Newly built Plants: 40 % Existing Plants: 50 %

Conventional Firing 35- 40 % Indirect Firing: 10 % - 15 %

Moderat

High to very High

2 % / 30 s (Grid Request in Ger) Up to 5 % / 30s possible

Up to 10 % / 10 s

Load Ramps (Secondary Control )

ca. 2 – 5 % / min

Up to 10 % / min

Load Ramps (Secondary Control )

10 % CoCombustion

100 % Combustion

Time for Start -up

Load Change Cycles

Load Jumps (Primary Control )

Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 35

001 1288p

© ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

Summary 

Use of conventional fossil fired Power Plants has changed decisively due to changed boundary Conditions – Power Trading, worldwide increasing Demand for Coal, increased Use of renewable Energy, departure from nuclear Power.



Less conventional Power Plants in Operation have to compensate difference between demand of Power and Generation of Power, using highly fluctuating renewable Energy Sources.



Power Plans are already at a high level of technology (Efficiency, Emissions and Operating Ranges) but need further Improvements to accomodate the Future Demands.



Further Tuning of Firing Components and Consideration of the Water and Steam Side, Load Range can be extended.



Wide Portfolio is ready for Use to help to extend Operation Load Ranges and Fuel Range and can improve the Start-up behaviour and Flexibility of existing as well as newly built Power Plants significantly.

Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 36 © ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

International Conference POWER PLANTS 2012

Thank you for your interest! ALSTOM Boiler Deutschland GmbH, Stuttgart Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 37 © ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

International Conference POWER PLANTS 2012

Questions?

ALSTOM Boiler Deutschland GmbH, Stuttgart Conventional Firing Systems for Future Power Plants - H. Brüggemann, T.-M. Marling - - 30.10. - 02.11.2012 - P 38 © ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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