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

General Description

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
Provider/source
Material
Assessment

FEFTS Specifications

Scientific paper

for Clean energy supply (Energy production system)

Renewable energy source

Biomass (Agricultural residues)

Technology used

Solid biomass conversion

Special type

wheat straw

Energy produced

Heat

Suitable/ideal for

Heat for buildings

Agricultural domain

Livestock, Greenhouses

Suitable for

Farmer, Advisory services, Other

Applications

Heating and cooling of agricultural constructions, Energy provision (e.g. electricity)

Especially

Farmer`s buildings, Solid biomass

Type of solution

Methodology, Procedure

This is a toast

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

FEFTS Specifications

Scientific paper

Renewable energy source

Technology used

Special type

Energy produced

Suitable/ideal for

Agricultural domain

Suitable for

Applications

Especially

Type of solution

Details

Relevant Files and Videos

Assessment

General

Environmental

Socioeconomic