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

Allgemeine Beschreibung

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

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Beurteilung

FEFTS-Spezifikationen

Wissenschaftliches Paper

für Saubere Energieversorgung (Energieerzeugungssystem)

Erneuerbare Energiequelle

Biomasse (Landwirtschaftliche Rückstände)

verwendete Technologie

Verwertung fester Biomasse

Typ

Weizenstroh

Erzeugte Energie

Wärme

Geeignet / ideal für

Wärme für Gebäude

Landwirtschaftlicher Bereich

Vieh, Gewächshäuser

Passend für

Landwirt, Beratungsdienste, Andere

Anwendungen

Heizen und Kühlen von landwirtschaftlichen Bauten, Energieversorgung (z.B. Strom)

Insbesondere

Landwirtschaftliche Gebäude, Feste Biomasse

Art der Lösung

Methodologie, Verfahren

This is a toast

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

FEFTS-Spezifikationen

Wissenschaftliches Paper

Erneuerbare Energiequelle

verwendete Technologie

Typ

Erzeugte Energie

Geeignet / ideal für

Landwirtschaftlicher Bereich

Passend für

Anwendungen

Insbesondere

Art der Lösung

Details

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Allgemein

Umwelt

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