Advances in New and Renewable Energy >
Gasification Performance of Biomass in a Coupled Drafting Fixed Bed Gasifier
Received date: 2015-05-18
Revised date: 2015-05-27
Online published: 2015-06-30
This paper evaluated the gasification performance of a 1.5 t/h coupled drafting fixed bed gasifier using eucalypt, and compared the operating parameters to other fixed bed gasifiers from literatures including updraft, downdraft and two-stage. The air with or without steam input amount was selected as a major controlling variable, temperature and pressure distribution, syngas composition, tar and fly ash content, gas yield were tested in a long period. The results show that the operating performance of the coupled drafting gasifier meets the design requirements. The operating temperature and pressure are relatively stable. The syngas calorific value is approximately 4 900 ~ 5 500 kJ/Nm3. In most of running conditions, the cold gas efficiency of about 70% ~ 78% could be obtained. The syngas tar content is mainly in the range of 600 ~ 3 500 mg/Nm3 and generally lower than 1 500 mg/Nm3 when running at capacities of higher than 50%. The parameters considered are all equal to or better than conventional downdraft fixed bed gasifier. The results are expected to improve the design and operation of the coupled drafting gasifier, and also to provide a reference for other gasification process.
Key words： biomass; coupled drafting fixed bed; gasification; cold gas efficiency; tar
HU Xia-yu , YUAN Hong-you , Xie Jian-jun , ZHOU Zhao-qiu , Pan Xian-qi , YIN Xiu-li , WU Chuang-zhi . Gasification Performance of Biomass in a Coupled Drafting Fixed Bed Gasifier[J]. Advances in New and Renewable Energy, 2015 , 3(3) : 163 -168 . DOI: 10.3969/j.issn.2095-560X.2015.03.001
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