煤灰熔融过程中的矿物演变及其对灰熔点的影响_杨建国.pdf

煤灰熔融过程中的矿物演变及其对灰熔点的影响_杨建国 第 26 卷第 17 期中国电机工程学报 Sep. 2006
2006 年 9 月 Proceedings of the CSEE ©2006 .
文章编号:0258-8013(2006)17-0122-05 中图分类号:TQ038 文献标识码:A 学科分类号:470×20
煤灰熔融过程中的矿物演变及其对灰熔点的影响
杨建国,邓芙蓉,赵虹,岑可法
(能源洁净利用国家重点实验室(浙江大学),浙江省杭州市 310027)

Mineral Conversion of Coal-ash in Fusing Process
and the Influence to ash Fusion Point
YANG Jian-guo, DENG Fu-rong, ZHAO Hong, CEN Ke-fa
(State Key Laboratory of Clean Energy Utilization (Zhejiang University),
Hangzhou 310027, Zhejiang Province, China)
ABSTRACT: Slagging characteristics of coal is one of the 关键词:工程热物理;煤灰;灰熔点;熔融特性;热分析;
main factors which influence the safety and economy of boiler X-射线衍射
in power plant. The Thermal behavior of two coal-ashes is
0 引言
studied by TG-DSC & XRD. The two coal-ashes are made from
Wenjialiang (Shenmu) coal and Xinzhuang (Huainan) coal,
我国低灰熔点煤储量丰富,据煤炭资源普查结
which have different ash fusion point (TDT= 1200℃ vs. >1500
果显示,我国低灰熔点煤占煤炭总量的1/3左右[1],
℃). There are distinct difference in TG-DSC curves and
different mineral changing in heating process between the two 这些低灰熔点的煤绝大多数是侏罗纪煤,燃用这类
coal-ashes, which finally cause the distinct difference of their 低灰熔点、强结渣性的煤易造成电站锅炉严重的结
ash fusion points. CaCO3 & CaSO4 which exist largely in 渣、腐蚀等问题。我国神木煤田作为世界七大著名
Wenjialiang coal-ash impel the generation of anorthite & 煤田之一,其产煤绝大多数是优质的侏罗纪煤:低
submellite i