添加剂对劣质煤燃烧特性和灰渣熔融性的影响  

EFFECT OF ADDITIVE ON COMBUSTION CHARACTERISTIC AND ASH MELTING OF INFERIOR COAL

作　　者：陈艳容[1] 李浩杰[1] 

机构地区：[1]重庆大学动力工程学院,低品位能源利用技术及系统教育部重点实验室

出　　处：《煤炭转化》2015年第1期69-74,共6页Coal Conversion

基　　金：重庆市应用开发项目(重点)(CSTC2014yykfB0185);中央高校基本科研业务费专项资金资助项目(CDJZR12140034)

摘　　要：利用热重-微分分析仪和灰熔点测试仪,研究了O2/CO2和O2/N2气氛下添加剂对重庆南桐高灰分劣质烟煤燃烧特性和煤灰灰渣熔融温度的影响,并进行了动力学分析.结果表明,添加剂CaCl2,Ca(OH)2和CaCO3均能有效地增加煤粉反应表面的活性,降低煤粉反应表观活化能、煤粉点燃温度和燃尽温度,提高煤粉可燃性指数C和燃尽指数Cb,但三种添加剂对煤粉燃烧促进作用有差异,其促进性能大小顺序为CaCl2>Ca(OH)2>CaCO3.添加剂CaCl2的加入能够提高煤粉的燃烧效率.添加剂Ca(OH)2和CaCO3的加入显著降低了煤灰熔融点温度,增加煤灰结渣可能性,而添加剂CaCl2的加入对煤灰灰渣熔融点温度降低不明显.CaCl2作为劣质煤燃烧添加剂,具有较好的综合性能.The effect of additives on the combustion characteristic and ash melting tem- perature of Chongqing Nantong high ash content bituminous coal under O2/CO2, 02/N2 atmos- phere was studied by the thermogravimetric-differential analyzer and ash melting point tester. The experimental results show that CaCl2, Ca（OH）2 and CaCO3 can effectively enhance the activity of pulverized coal response surface and reduce the temperature of coal reaction activation energy, the igniting and the burnout. And these additives can improve coal combustibility index C and burnout index Cb as well. The ability of promoting effects is CaC12 2〉Ca（OH）2〉CaCO3. CaCl2 can increase the heat quantity of unit pulverized coal, and improve the combustion efficiency of pulverized coal. Additive Ca（OH）2 and CaCOa can significantly reduce the ash melting tem- perature, and increase the possibility of coal ash slagging. Therefore, CaCl2 has good comprehensive performance and it is an effective additive for inferior coal combustion.

关 键 词：添加剂 劣质煤 燃烧 熔融温度 动力学分析 

分 类 号：TQ534[化学工程—煤化学工程] O643[理学—物理化学]