WasteBoost TM Superheating Supplied by Gasification. Ole Hedegaard Madsen Director Technology & Marketing

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2 WasteBoost TM Superheating Supplied by Gasification Ole Hedegaard Madsen Director Technology & Marketing

3 Agenda Introduction Proven technology but still improving! Reno Nord super thermal efficiency Gasification Harboøre Plant WasteBoost External steam superheater FTG Gärstad, Sweden a case story What is on the horizon

4 Proven technology but still improving! Modern combustion systems = Waste Fired Power Plants Water cooled combustion grates Water cooled wear zone and sealing New furnace development CFD advanced design tool for calculating heat and mass transfer Optimizing secondary and over fire air systems Waste fired boilers corrosion! Protect you investment = Inconel ACC advanced combustion control systems Get the highest electrical out put

5 Waste Fired Power Plants High Energy Efficiency el = 27 % Th = 97 % Modern Design Reno Nord

6 Limitation of Electrical Efficiency Electrical Efficiency: Temperatures Excess Air Steam Data High Corrosion Area Fin centre tempeature Corrosion caused by: Increasing: Steam temperature. Flue gas temperature. Particle impact. High velocity. Metal Temperatu Flue Gas Temperature [ C] Low Corrosion Area 500

7 WasteBoost - superheating of the steam parameters with a VølundSystems biomass gasifier.

8 Gasification principles Numerous concepts! Few of these tested in pilot or full scale! Few of these with a decent log of operating hours! Few of these with power production! Babcock & Wilcox Vølund = Harboøre CHP

9 Product gas Drying Pyrolysis Reduction Oxidation Fuel Up-draft gasification A new technology based on an old concept A B&W Vølund research area since 1988 Licensed to: JFE Engineering Corp. - Japan RELAX Umwelttechnik - Germany Ash Steam/Air

10 The Harboøre CHP plant First of a kind focus on having the overall concept working not optimization of the performance Fuel: Woodchips. Moisture content: % 3.5 MW fuel / 1 MW e Commissioned in 1996 Originally designed for district heating CHP capability added in 2000

11 Woodchips Flue gas Gas fired Boiler Scrubber Gasifier Gascooler/ Cleaner Tar in Raw gas: Tar: g/nm 3 dry Light tar: g/nm 3 dry Gas engines Tar in cleaned gas: Tar (condensable): < 2 Water mg/nm 3 dry Tarwatc Air Ash Tar storage Stack

12 Woodchips Flue gas Gas fired Boiler Scrubber Productgas Gascooler/ 2003: H h MJ/Nm Cleaner 3 dry % H Gasifier % CO Gas engines Tarwatc Water Air 7-10 % CO Ash% CH 4 < 0.5 % OTar 2 storage Tar fired Boiler Stack

13 Woodchips Gasifier Wastewater as condensate without additional treatment: m 3 /h ph 5-7 COD mg O 2 /l N total mg/l Acetic acid 1-15 mg/l Gas fired Boiler Gascooler/ Cleaner Scrubber Gas engines Tarwatc Water Flue gas Air Ash Thermal treatment of waste water contaminated with organics. Stack

14 Woodchips Gas fired Boiler Tar: MJ/kg Scrubber Flue gas Gas engines Gasifier Gascooler/ Cleaner Tarwatc Water Air Ash Tar storage Tar fired Boiler Stack

15 Woodchips Flue gas Gas fired Boiler Scrubber Gasifier Gascooler/ Cleaner Ash: Gas engines 1 % (w/w dry ) TOC: % Water dry PAH: < 0.5 mg/kg dry Dioxin: below Tarwatc detection limit Air Ash Tar storage Tar fired Boiler Stack

16 WasteBoost = High Electrical Production Basic principle Gasification Syn gas HF Oil = tar Waste Wood Excellent ash Syn gas External Super Heating No risk of corrosion Integrated system Incineration of Tar Water T out = 520 C 968 F T in = 400 C 752 F

17 The principle

18 The Waste Fired Power Plant Gärstad, Sweden

19 The Waste Fired Power Plant Gärstad, Sweden

20 Woodchips Moist 45 % Hn 9,15 MJ/kg wet Flow 7500 kg/h LHV 19,1 MW 1,12 MW Steam out 430 C and 17 Bar Enthalpy 108 MW Steam in 210 C and 19 Bar Enthalpy 91 MW 117 ton/h = 32,5 kg/s 16.9 MW Flue gas Flow Nm 3/ h O 2 6,4 % wet Air Nm 3 /h 120 C Air 3300 Nm 3 w /h 25 C Water 800 kg/h 50 C External Super Heater 250 C Airpreheater 180 C Condenser (optional) Ash 42 kg dry /h Temp. 75 C Gas flow 7050 Nm 3 dry /h Heavy tar 400 kg/h Light tar 410 kg/h Particles 1-2 g/nm 3 LHV 19,7 MW 0,71 MW Moist air 120 C 4300 Nm 3 wet 3,7 MW

21 Woodchips Moist 45 % H n 9,15 MJ/kg wet Flow 9000 kg/h LHV 22,9 MW 75 C 2,3 MW 1,12 MW Air Nm 3 /h 120 C Steam out 430 C and 17 Bar Enthalpy 108 MW 16.9 MW Steam in 210 C and 19 Bar Enthalpy 91 MW 117 ton/h Air 3940 Nm 3 w /h 25 C Water 800 kg/h Flue gas Flow Nm 3/ h O 2 6,4 % wet 50 C Gas Cooler 33 C External Super Heater Air preheater Condenser (optional) 0,77 MW Ash 50 kg dry /h Light tar 520 kg/h Water 2700 kg/h H n 0 MJ/kg Flue gas Nm 3 /h wet 3,7 MW Tar H n LHV 200 kg/h 28,3 MJ/kg 1,6 MW Moist air 120 C 5100 Nm 3 wet

22 Woodchips Moist 45 % H n 9,15 MJ/kg wet Flow 9000 kg/h LHV 22,9 MW 1,12 MW Utilization of Tar 75 C Air Nm 3 /h 120 C Steam out 430 C and 17 Bar Enthalpy 108 MW 16.9 MW Steam in 210 C and 19 Bar Enthalpy 91 MW 117 ton/h Air 3940 Nm 3 w /h 25 C Tar is proven 2,3 MW as substitute for heavy fuel oil Water 800 kg/h Flue gas Flow Nm 3/ h O 2 6,4 % wet 50 C Ash 50 kg dry /h Gas Cooler 33 C External Super Heater 200 kg Tar per hour results in: 1400 tonnes per year (7000 hour/year) GJ per year Air preheater Light tar 520 kg/h Water 2700 kg/h H n 0 MJ/kg Flue gas Nm 3 /h wet tonnes heavy fuel oil (40 MJ/kg) per year saving 5 mill. SEK (5 SEK/kg heavy fuel oil) 0,77 MW Tar 200 kg/h additional fuel 4.2 mill. SEK (400 SEK/tonnes wood H n 28,3 MJ/kg LHV 1,6 MW Moist air chips) 120 C 5100 Nm 3 wet Condenser (optional) 3,7 MW

23 Potential Opportunities Gasifier operating 7000 hours per year Electricity 20 MW MWh Heat 72 MW MWh Tar (Heavy Fuel Oil substitute ) 200 kg/h 1000 ton

24 Advantages WasteBoost Multi Fuel = Flexibility Wood chips Waste wood Others? External Gas Fired super heater No corrosion High temperatures No ash mixing Gasification Reactor Rapid control of production Bio oil = 15 % of Q in Cost effective Small foot print Simple system Easy integration

25 Applications Conventional CHP plant Small plant with high electrical efficiency External super heater for W-t-E WasteBoost Co-firing Systems for PC Power Plants No ash mixing Utilization of heavy tar Bio oil Production of hydrogen Fuel cells

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