Agglomeration in fluidized bed combustion of biomass -- Mechanisms and co-firing with coal
Conference
·
OSTI ID:20006784
This paper presents the results from systematic experiments conducted in a laboratory scale fluidized bed combustor in order to study agglomeration phenomena during firing straw and co-firing coal with straw. The results show that temperature has the most pronounced effect on the agglomeration tendency. When co-firing coal with straw, the defluidization time can be extended significantly. Examination of the agglomerates sampled during combustion by various analytical techniques indicates that the high potassium content in straw causes the formation of agglomerates. In the combustion process, potassium containing compounds are prone to remain in the bed and form low melting temperature potassium rich ash. The molten ashes coat the surfaces of the bed material, promoting agglomeration and defluidization in FBC. Based on the experimental results, the mechanisms of agglomeration are discussed and strategies for minimizing agglomeration are proposed.
- Research Organization:
- Technical Univ. of Denmark, Lyngby (DK)
- OSTI ID:
- 20006784
- Report Number(s):
- CONF-990534--
- Country of Publication:
- United States
- Language:
- English
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