Objective
Demonstration of the technical and economical viability of Atmospheric Circulating Fluid Bed Gasification of contaminated waste wood, purification of the low calorific gas and co-combustion of the gas in a 600 MWe coal fired power plant. The fossil fuel savings are approximately 70.000 tons of coal (50.000 TOE), based on 150.000 tons of waste wood (construction and demolition waste). The CO2 reduction is 170.000 ton/year.
1. INNOVATION
a) Gasification of contaminated wood in a large scale, continuous process;
b) Purification of the gas before introduction in the power block in order to prevent deterioration of the ash quality and to allow compliance with the emission regulations. The technology will be demonstrated at a relatively new coal fired heat unit of EPZ (Amer 9 at Geertruidenberg, NL).
2. THE CONTEXT
Straight admixture of relatively clean waste wood in a coal fired power plant is probably viable (viz EPON coal fired power plant Nijmegen). The contaminants of demolition waste wood may however increase fouling of heating surfaces, increase corrosion of tubes and may negatively affect the quality of the rest products (the fly ash is used for almost 100% in the cement industry). Therefore the choice was made for gasification at +/- 850 to 950 deg. C in an Atmospheric Circulating Fluidised Bed. The low calorific product gas is subsequently cooled to 250 deg. C and purified (baghouse filtration). The gas is introduced by 4 separate LC gas burners in the power block for co-combustion with coal. Previous studies and small scale experiments have indicated that the purified gas does not negatively affect the operation of the power plant.
3. ECONOMIC ASPECTS
The electricity production capacity is +/- 30 MWe. Estimated operating time (base load) is 7000 hours. Total production is 205 x 1000000 kWhr per year. Fuel component in electricity price is 0,017 ECU/kWhr; CO2 allocation (biomass) is 0,02 ECU/kWhr. The annual monetary value of the energy produced with the LC gas is thus 205 x 1000000 x 0.037 MECU = MECU 7.6 (E).
The annual operating and maintenance costs (excluding monitoring costs, financial and depreciation charges) of the installation(s) in the project are : MECU 2.95 per annum, resulting in annual operational benefits of 0.6 MECU (M).
Overall extra investment costs are estimated to be MECU 35.8. The payback period Tis calculated as :
T = I = 35.8/(7.6+0.6)=4.4 yecalculated as :
T = I = 18.6/(5.45+0.3)=3.2 years
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E-M
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques.
- engineering and technologyenvironmental engineeringenergy and fuelsfossil energycoal
- agricultural sciencesagricultural biotechnologybiomass
- agricultural sciencesagriculture, forestry, and fisheriesforestry
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Call for proposal
Data not availableFunding Scheme
DEM - Demonstration contractsCoordinator
5201 HA 'S Hertogenbosch
Netherlands