Short Description
At BEST - Bioenergy and Sustainable Technologies GmbH, a special and unique device for combustion tests is available. It consists of a biomass furnace, a gas burner and an electrically heated drop-tube. The device can be used for investigations concerning:
1) Combustion and release behaviour of different chipped and pelletised biomass fuels and
2) Studies on deposit formation and its mechanism, corrosion and erosion on furnance walls and heat exchangers of biomass fired boilers.
Contact Person
Kai Schulze
Research Services
• Determination of the combustion behaviour of various biomass fuels
• Determination of the release behaviour of e.g. NOx-precursors and volatile ash forming elements
• Research on aerosol formation processes
• Investigation of erosion and high temperature corrosion behaviour of fly ash particles and condensable ash forming vapours
• Detailed evaluation of deposition processes (condensation of ash vapours, fine particle formation and precipitation, erosion, stickiness of coarse fly ash particles)
• Evaluation of the influence of additives on combustion and deposit formation processes
• Validation of developed CFD-simulation models on aerosol formation, particle stickiness, aerosol and coarse fly ash deposit formation processes and determination of model parameters
Methods & Expertise for Research Infrastructure
The experimental set-up (shown in the Figure) includes:
• Biomass grate furnace (1) and gas burner (8)
• Upper connection duct (9) equipped with a radiatively cooled section (13) and an injection tube for additives (11+12)
• Electrically heated drop-tube (14) to adjust the flue gas temperature in order to achieve a fully developed pipe flow at the measurement ports (15)
• Measurement port for gas, particle and deposit sampling (15)
• Water cooled bypass (18) and heat exchanger (19)
• Flue gas ducts after heat exchanger, to chimney (23) and flue gas recirculation (6) with measurement ports for O2, CO, CO2, NOx, OGC, PM1 and dust
Thermal capacity:
• Biomass fuel power input: 12 – 50 kW
• Gas burner: 8 – 90 kW
Installed measuring systems
• 13 temperature measurements along the flue gas pathway through the system
• 5 pressure measurements in different sections of the system
• 11 temperature measurements and 3 heat meters in the cooling circle
• Flow measurements of the combustion air supplied, the flue gas recirculated and the flue gas at chimney inlet
Allocation to research infrastructure
Analytical Laboratory for Solid Biofuels and Process Products
BRISK II, Biofuels Research Infrastructure for Sharing Knowledge II, Duration: 2017- 2023, Horizon 2020, www.brisk2.eu