Experimental measurements for torrefied biomass Co-combustion in a 1 MWth pulverized coal-fired furnace

被引:26
|
作者
Alobaid, Falah [1 ]
Busch, Jan-Peter [1 ]
Stroh, Alexander [1 ]
Stroehle, Jochen [1 ]
Epple, Bernd [1 ]
机构
[1] Tech Univ Darmstadt, Inst Energiesyst & Energietech, Otto Berndt Str 2, D-64287 Darmstadt, Germany
关键词
Biomass; Torrefaction; Pulverized coal; Co-combustion; 1 MW pulverized coal-fired furnace; TORREFACTION; SIMULATION; BLENDS; GRINDABILITY; PRETREATMENT; EMISSIONS;
D O I
10.1016/j.joei.2019.07.008
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Biogenic residues upgraded by torrefaction are well suited for co-firing in existing thermal power plants due to their increased net calorific value, their improved grindability and their good characteristics regarding storage and transport. In this work, torrefied and pelletized biomass (coniferous wood sawdust) and hard coal (Columbian Calenturitas) were co-combusted in a 1 MWth pulverized coal-fired furnace. The mixture of both fuels (torrefied biomass and hard coal) was co-grinded at two ratios with a thermal share of biomass of 3.8% and 7.3% using the same coal mill. For comparison purpose, experiments on pure hard coal combustion (only coal) were carried out, too. Despite torrefaction, the throughput of the mill was sharply reduced at higher biomass shares and the average grain size of pulverized fuel was increased. However, both fuel blends were co-combusted without any difficulty. Compared to mono-combustion of the hard coal, no significant differences were detected, neither in the flue gas emissions nor in the char burnout. Gas measurements in the flame profile show higher levels of released volatile matter close to the burner, resulting in a higher oxygen demand. (C) 2019 Energy Institute. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:833 / 846
页数:14
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