Doosan Babcock. Biomass. Coal-to-biomass conversions for efficient thermal power

Transcription

1 Doosan Babcock Biomass Coal-to-biomass conversions for efficient thermal power

2 Doosan Babcock Biomass Breathing new life into your plant Coal-to-biomass fuel conversions give you access to efficient power generation and lower emissions. Doosan Babcock has decades of experience in developing 100% biomass and biomass co-firing combustion systems, with large-scale references across Europe and North America. Optimum asset utilisation Coal has fuelled power generation for over 100 years, but the need to tackle climate change is challenging its future viability. As a result, existing coal plants are at risk of closure despite having significant design life left, which is subsequently leaving utilities with stranded assets and putting considerable pressure on reserve capacity margins. Compliance with future NOx and SOx emissions regulations Doosan Babcock s biomass conversions allow you to continue to utilise these assets, avoiding the need to build new plant or close coal plants which may have only used a fraction of their design life, while at the same time offering low-cost CO2 neutral power generation. Flexible coal-to-biomass conversion solutions Attractive economics as the capital outlay for the existing plant is often fully or partially depreciated. Opportunity to bring plant to modern standards and renew time-expired components with modern equivalents and increase plant performance with modern high efficient turbine components. Bespoke technologies designed to meet each plant s needs. Opportunity to meet future NOx and SOx compliance with lower capital expenditure due to the low nitrogen content and lack of sulphur in biomass fuels. Conversion technologies focus on boiler plant, PF and CFB combustion; steam turbines, from simple refurbishment to full steam path retrofit; and life-time extension to match the plant future. Wood from sustainable sources is clean, renewable and carbon neutral. Extended life and limited capital outlay Bespoke technologies tailored to your plant

3 Typical conversion scope Upgrade of the fuel handling system for biomass is required including fire and explosion suppression. Existing vertical spindle mills may be modified or replaced with new vertical spindle or hammer mills as appropriate. Reduction of mill inlet temperature is required due to lower ignition temperature of wood. Additional heat can be recovered to minimise impact on efficiency. Existing burners may need to be modified due to larger particle size of pulverised wood, or alternatively a new low NOx biomass combustion system can be provided. Additional primary or secondary NOx control technologies such as OFA, BOFA or SNCR may be required to meet emissions compliance. Bottom ash systems may need replacing with a dry bottom ash conveyer. Primary air fans may require upgrading due to higher pressure drop associated with transportation of biomass. Modifications of heat transfer surfaces such as the superheater or economiser may be required, dependent on boiler design. Additional water lances or soot blowers may need to be installed to control ash coatings on heating surfaces. Efficiency improvement measures such as flue gas cooler or turbine upgrades can be utilised to maximise efficiency. Superheater/economiser (surface modifications) Mill air temperature reduction Secondary NOx control Fuel handling (bunker/feeder modifications) Air heater temperature adjustments Milling plant (replace /modify) Flue gas cooler Furnace cleaning devices Dust collection (upgrade/refurbish) Turbine (efficiency upgrade) Feedwater heaters (low feed temperatures) Combustion system (biomass modifications)

4 Doosan Babcock Biomass Our burner technologies Doosan Babcock is a trusted partner for the delivery of reliable and efficient steam production, bringing together over a century of experience in burner design to provide combustion technologies that maximise the performance of your plant. Doosan Babcock s 70MWth Clean Combustion Test Facility is the world s largest burner test facility, designed for the development of combustion systems. In 2013, the facility was upgraded to enable the firing of wood pellets. Operated to the highest environmental standards, our test facility is capable of testing full scale burners up to 70 MWth and firing a wide range of coals from anthracite, bituminous and sub-bituminous to pre-dried lignite and biomass fuels.

5 Optimum asset utilisation Doosan Babcock s biomass burner builds on our Mark III burner technology, utilising the widely proven air register design in conjunction with an optimised fuel cartridge, specifically designed for biomass fuels. Doosan Babcock has developed a low NOx biomass burner that efficiently fires both white and black pellets. Our 2nd generation low NOx biomass burner showed a consistent 45-50% NOx reduction over our 1st generation biomass burner across a typical range of operating stoichiometries. We supply and install new combustion systems and controls, make all the necessary modifications to boiler pressure parts and tubes, and address impacts in auxiliary systems.

6 Doosan Babcock Biomass

7 Our experience Doosan Babcock s technologies are behind some of the world s largest biomass plants, helping customers meet the requirements of regulatory compliance, while at the same time providing efficient and reliable power generation. Project name, country Scope Fuel Units x MWe Contract award date Customer Yeong Dong, Korea 100% biomass conversion; conversion of downshot boiler 1 x KOSEP Lynemouth, UK 100% biomass conversion; FEED study completed Black / white pellets 3 x RWE Gardanne, France 100% coal-to-biomass conversion, turbine upgrade and life extension Various biomass 1 x Societe Nationale d Electricite et de Thermique Drax, UK Conversion of E-mills and associated burners from coal to wood pellet firing 2 x Drax Power Limited Drax, UK Conversion of three E-mills and associated burners from coal to wood pellets 1 x Drax Power Limited Ironbridge, UK 100% coal-to-biomass conversion of Units 1 and 2 2 x E.ON UK Atikokan, Canada 100% biomass firing 1 x Ontario Power Generation Drax, UK Conversion of two E-mills from coal to wood pellet firing 1 x Drax Power LImited Rybnik, Poland Biomass unloading, storage and milling N/A 2010 EDF Drax, UK Installation of 12 direct injection biomass co-firing systems 6 x Drax Power Limited Hasselby CHP, Sweden Conversion of coal mills and burners to 100% wood pellet firing 3 x Hasselby Power

8 Biomass feasibility and feed studies Project name, country Scope Contract award date Customer Hasselby CHP, Sweden Design study for conversion of coal mills and burners to 100% wood pellet firing 1992 Hasselby Power Burger, USA Feasiibility study for conversion from coal to 100% biomass firing 2009 First Energy Nanticoke, Canada Design study for conversion of pulverisers from coal to 100% biomass (wood pellets) 2009 Ontario Power Generation Drax, UK 100% biomass firing feasibility study 2010 Drax Power Limited Uskmouth, UK 100% biomass firing feasibility study 2010 SSE Atikokan, Canada 100% biomass firing FEED study 2010 Ontario Power Generation Nanticoke, Canada Feasibility study for conversion of a pulverised coal boiler to co-firing of biomass and natural gas 2010 Ontario Power Generation Ironbridge, UK 100% biomass firing feasibility study 2011 E.ON UK Tilbury, UK Feasibility and FEED studies for the conversion of a pulverised coal boiler to 100% wood firing 2011 RWE Biomass co-firing Project name, country Scope Contract award date Customer Tilbury, UK Biomass co-firing system design study 2001 RWE Ferrybridge UK Biomass (olive residue) co-firing consultancy and testing 2002 AEP Ironbridge, UK Biomass co-firing trials 2003 TXU Cottam, UK Biomass co-firing consultancy and testing 2003 EDF Energy Drax, UK Biomass co-firing consultancy and trial work 2003 Drax Power Limited Cockenzie and Longannet, UK Biomass (sawdust) co-firing by premixing and co-milling: consultancy and trial work 2004 Scottish Power Drax, UK Direct injection system design 2005 Drax Power Limited Kilroot, UK Biomass (olive residue) co-firing consultancy and testing 2005 AES Trenton, UK Direct biomass co-firing system study (25% heat input) 2009 Nova Scotia Power Inc Drax, UK Installation of 12 direct injection biomass co-firing systems 2009 Drax Power Limited Doosan Babcock Doosan House Crawley Business Quarter Manor Royal, Crawley West Sussex RH10 9AD United Kingdom Tel: +44 (0) Porterfield Road Renfrew, PA4 8DJ United Kingdom Tel: +44 (0)