Utilization of agricultural waste in power production
Conference
·
OSTI ID:140334
- ELSAMPROJEKT A/S, Fredericia (Denmark)
- MIDTKRAFT Power Co., Aarhus (Denmark)
It is a goal of the Danish energy policy for the last decade to reduce energy consumption and to introduce fuels for power production with less CO{sub 2} emission than coal. This measure has caused a considerable effort by the Danish utilities to develop technologies that reduce CO{sub 2} emissions without causing heavy cost increases of power. Agricultural waste in the form of surplus straw is available in an amount equivalent to 20% of the annual coal imports to Denmark. Straw firing is difficult due to its significant contents of alkaline components. Consequently, its utilization presupposes the development of new technologies. The biomass development program is concentrated on two ways which are (1) co-firing of existing coal fired power station with a modest amount of straw and (2) development of CFB technology that allows a high share of biomass as well as coal only. These options were tested in a coal fired 70 MW spreader stoker unit and a 125 MW PF unit. Approx. 4000 t of straw were burned. Additional tests will be launched this autumn, burning 35,000 t of straw at rates up to 20% straw. The CFB option is pursued from the platform of a 80 MWth unit, operational early `92. This plant burns a mix of 50% straw and 50% coal and consumes annually 70.000 t of straw. Future development is aiming towards CFBs of 250 MW(e), burning in excess of 50% biomass.
- Research Organization:
- National Renewable Energy Lab., Golden, CO (United States)
- OSTI ID:
- 140334
- Report Number(s):
- NREL/CP--200-5768-Vol.1; CONF-9308106--Vol.1; ON: DE93010050
- Country of Publication:
- United States
- Language:
- English
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