Co-firing of pine chips with Turkish lignites in 750 kWth circulating fluidized bed combustion system

Date

2017-01-01

Author

Atımtay, Aysel
Unlu, Alper
Engin, Berrin
Varol, Murat
OLGUN, HAYATİ
Atakül, Hüsnü

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Two Turkish lignites which have different sulfur levels (2-2.9% dry) and ash levels (17-25% dry) were combusted with a Turkish forest red pine chips in a 750 kW-thermal capacity circulating fluidized bed combustor (CFBC) system. The combustion temperature was held at 850 +/- 50 degrees C. Flue gas emissions were measured by Gasmet DX-4000 flue gas analyzer. Two lignites were combusted alone, and then limestone was added to lignites to reduce SO2 emissions. Ca/S = 3 was used. 30% percent of red pine chips were added to the lignites for co-firing experiments without limestone in order to see the biomass effects. The results showed that with limestone addition SO2 concentration was reduced below the limit values for all lignites. CO emissions are high at low excess air ratios, gets lower as the excess air ratio increases. During co-firing experiments the temperature in the freeboard was 100-150 degrees C higher as compared to coal combustion experiments.

Subject Keywords

Emissions, Coal and biomass, Co-combustion, Circulating fluidized bed, Pilot scale combustor

URI

https://hdl.handle.net/11511/31891

Journal

BIORESOURCE TECHNOLOGY

DOI

https://doi.org/10.1016/j.biortech.2016.10.065

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

A. Atımtay, A. Unlu, B. Engin, M. Varol, H. OLGUN, and H. Atakül, “Co-firing of pine chips with Turkish lignites in 750 kWth circulating fluidized bed combustion system,” BIORESOURCE TECHNOLOGY, pp. 601–610, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/31891.