Detailed kinetic and control of alkali metal compounds during coal combustion
Detailed kinetic and control of alkali metal compounds during coal combustion
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DOI：
10.1016/j.fuproc.2007.06.010
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发表时间：
2007-12-01
影响因子：
7.5
通讯作者：
Naruse, Ichiro
中科院分区：
文献类型：
--
作者：
Takuwa, Tsuyoshi;Naruse, Ichiro
煤中的碱金属化合物有时在燃烧锅炉中起到腐蚀和/或侵蚀的作用。因此，有必要深入了解煤燃烧过程中碱金属化合物的详细动力学和行为，并开发其燃烧控制技术。在电加热落管式炉上，用低压冲击器（LPI）对几种煤进行了燃烧试验，其粒度范围为0.03 ~ 11 μ m。由于碱金属化合物在燃烧过程中的行为很难直接测量，然而，通过详细的动力学计算，使用CHEMKIN程序，还模拟了Na化合物蒸气在H2-空气火焰中的行为。为了控制煤燃烧过程中的碱金属化合物，同时，将少量高岭土用作碱金属化合物的吸附剂，与煤混合，并一起燃烧。(C)2007 Elsevier B. V.保留所有权利。
Alkali metal compounds in coal sometimes play a role for corrosion and/or erosion in combustion boilers. Therefore, it is necessary to understand detail kinetics and behaviors of the alkali metal compounds during coal combustion, and to develop the control technologies for them during combustion. Combustion tests for several types of coal are conducted, using an electrically heated drop tube furnace with a low pressure impactor (LPI), which can separate the particulates with size ranged from 0.03 to 11 mu m. As direct measurement of behaviors of alkali metal compounds during combustion is difficult, however, behavior of vapors of Na compounds in H-2-air flame is also simulated by detail kinetics calculation, using the CHEMKIN code. To control the alkali metal compounds during coal combustion, while, a little amount of kaolin that is used as a sorbent for the alkali metal compounds, is mixed with the coal, and is burned together. (C) 2007 Elsevier B.V. All rights reserved.