FOSTER WHEELER K7 BIOFUEL BOILER

Used 2001 Foster Wheeler K7 Biofuel Boiler Located in Europe Main Steam Cycle BFB boiler K7 All insulation removed 2018 Some parts removed and storaged indoor at the mill area Boiler is made electrically safe (cables cut) Dry conservation ongoing since 2014 (tubes filled with nitrogen, dry air circulation) Main fuels Bark, saw dust, wood chips and waste wood Sulphur <0,05% Moisture 30-65% LHV 3,7-6,9 MJ/kg Peat Sulphur 0,25% Moisture 40-58% LHV 6,3-11,3 Sludge from WWTP Sulphur 0,2-1,7% Moisture 65-75% LHV >0,5MJ/kg max. 7% of fuel power Supplier Foster Wheeler Oy Commissioning 2001 Heat Output 88 MWth Steam parameters 33,5 kg/s, 90 bar (36 kg/s,115 bar), 525 C Feed water temp. 135-190°C Flue Gas Exit temp. 153°C Bag Filter (Alstom) 4 chambers 376 bags, 7 m long DAS (Dry Absorption System) Pre-coating with Ca(OH)2 max. operating temperature 200 °C Boiler Efficiency 88,5% SO2 Emissions < 395mg/Nm3 NOx < 425mg/Nm3 PM < 50mg/Nm3 Flue Gas Scrubber (Ehox Tuote Oy) 2 scrubbers, 1 in operation 27 Nm3/s, 170°C in 20 Nm3/s, 43°C out Heat Recovery 18 MW at low temperature, 60°C