EFFECT OF FLUIDIZATION RATIO ON THE PERFORMANCE OF AN INTERNALLY CIRCULATING AERATED FLUIDIZED BED GASIFIER WITH CONCENTRIC CYLINDERS

Simanjuntak, Janter P. (2016) EFFECT OF FLUIDIZATION RATIO ON THE PERFORMANCE OF AN INTERNALLY CIRCULATING AERATED FLUIDIZED BED GASIFIER WITH CONCENTRIC CYLINDERS. In: The 8th International Convention of Indonesian Association of Technological and Vocational Education (APTEKINDO) and 19th Indonesian Congress of FT/FPTK-JPTK, 3-6 Aug 2016, Medan.

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Abstract

Effects of fluidization ratio (RQ) on the bed temperature, composition and heating value (HV) of producer gas (PG) during gasification of sawdust in an internally circulating aerated fluidized bed gasifier (ICAFBG) based on the indirect heating principle with concentric cylinders were studied. RQ which is the ratio of aeration rate in annulus (Qan) to the fluidization rate in the draft tube (Qdt) strongly affect the ICAFBG performance as it is a driving force to transport the char from gasification to the combustion zones. The char combustion in the combustor (draft tube) is the heat provider to the gasification process in the gasification zone (annulus). The results showed that by increasing RQ resulting in increased bed material temperature, PG composition and HV. However, increase RQ further caused temperature reduction as well as PG composition and HV. The HV could be increased from 4.52 to 6.98 MJ/m3 in the RQ ranges from 0.14 to 0.43. However, by increasing RQ further to 0.57 caused reduction in HV to 5.61 MJ/m3. The highest bed temperature which can be achieved was 806 oC at 0.43of RQ.

Item Type: Conference or Workshop Item (Paper)
Keywords: Sawdust gasification; Bed gasifier; Bed material; Concentric cylinders
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TP Chemical technology > TP155 Chemical engineering
Divisions: Fakultas Teknik > Pendidikan Teknik Mesin
Depositing User: Mrs Harly Christy Siagian
Date Deposited: 08 Nov 2017 09:32
URI: http://digilib.unimed.ac.id/id/eprint/27053

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