Torrefied biomasses in a drop tube furnace to evaluate their utility in blast furnaces

被引:125
作者
Chen, Wei-Hsin [1 ]
Du, Shan-Wen [2 ]
Tsai, Chien-Hsiung [3 ]
Wang, Zhen-Yu [3 ]
机构
[1] Natl Univ Tainan, Dept Greenergy, Tainan 700, Taiwan
[2] China Steel Corp, Iron & Steel Res & Dev Dept, Kaohsiung 812, Taiwan
[3] Natl Pingtung Univ Sci & Technol, Dept Vehicle Engn, Pingtung, Taiwan
关键词
Torrefaction and pretreatment; Pulverized coal injection (PCI); Drop tube furnace; Burnout; R-factor; PULVERIZED COAL COMBUSTION; TORREFACTION; INJECTION; REACTIVITY; BLENDS; WOOD; MATTER;
D O I
10.1016/j.biortech.2012.01.163
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
Torrefaction and burning characteristics of bamboo, oil palm, rice husk, bagasse, and Madagascar almond were studied and compared with a high-volatile bituminous coal using a drop tube furnace to evaluate the potential of biomass consumed in blast furnaces. Torrefaction at 250 and 300 degrees C for 1 h duration was carried out. Analysis using the ash tracer method indicated that the extent of atomic carbon reduction in the biomasses was less than that of atomic hydrogen and oxygen. Torrefaction also lowered the sulfur content in bamboo and oil palm over 33%. An examination of the R-factor and burnout of the samples suggests that more volatiles were released and a higher burnout was achieved with raw and torrefied biomasses at 250 degrees C than at 300 degrees C; however, torrefaction at 300 degrees C is a feasible operating condition to transform biomass into a solid fuel resembling a high-volatile bituminous coal used for blast furnaces. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:433 / 438
页数:6
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