Agro Fossil Free - Evaluation of an Operation of Burning of a Wheat Straw Batches in a Pilot Scale Facility

General beskrivelse

Two experimental trials of burning of 200kg wheat straw batches, with an energy content of 840kWh, were performed in April 3 and April 4 of 2017, lasting by 344mins and 315mins., in a 125kW combustion pilot scale boiler at the Foulum campus of Aarhus University in Denmark. The forwardness of combustion, with a 500m3 of primary and secondary air inflow per hour, was monitored by continuous measurements of temperature and oxygen and carbon monoxide emissions in flue gases. The flue gases were cooled by heat exchange with water flowing in pipes around the boiler. The exchanged heat measured was 700kWh, allowing to estimate an energetic combustion efficiency of 83%. The harmful emissions of carbon monoxide obtained in the two trials averaged 365ppm and 58ppm, values which are environmentally acceptable. The energy efficiency and emission results compared favorably with other combustion experiments with boilers of lower dimension and different kind of agricultural biomasses. Carbon monoxide emissions were low and steady with peaks mainly in the beginning and in the end of the experiments. Particle emissions in the April 3 trial were also measured, reporting an average of 455mgnm-3. A detailed analysis of the processes indicated that the implemented optimization of instrumentation and of the mechanisms for input of primary and secondary air, allowed providing an adequate performance of the boiler.

Key words: Boiler, straw, carbon monoxide, oxygen, particles, temperature, flue gas, efficiency

Evaluation of an Operation of Burning of a Wheat Straw Batches in a Pilot Scale Facility

Information
Udbyder/kilde
Materiale
Vurdering

FEFTS specifikationer

Videnskabeligt papir

Til Ren energiforsyning (Energi produktionssystem)

Vedvarende energikilde

Biomasse (Affaldsprodukter fra landbrug)

Anvendt teknologi

Konvertering af fast biomasse

Speciel type

Hvede halm

Energi produceret

Varme/kølingstype

Velegnet/ideel til

Varme til bygninger

Landbrugsdomæne

Husdyrhold, Drivhuse

Egnet til

Landmand, Rådgivning, Andet

Ansøgninger

Opvarmning og køling af landbrugskonstruktioner, Energiforsyning (f.eks. elektricitet)

Især

Landbrugsbygninger, Fast biomasse

Løsnings type

Metode, Procedure

This is a toast

Evaluation of an Operation of Burning of a Wheat Straw Batches in a Pilot Scale Facility

FEFTS specifikationer

Videnskabeligt papir

Vedvarende energikilde

Anvendt teknologi

Speciel type

Energi produceret

Velegnet/ideel til

Landbrugsdomæne

Egnet til

Ansøgninger

Især

Løsnings type

Detaljer

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Vurdering

Generelt

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Socioøkonomisk