添加剂对五彩湾煤燃烧过程中钠析出的影响  

The Influence of Additive on the Emission of the Sodium Contained in Wucaiwan Coal During Combustion

作　　者：涂圣康 张守玉[1] 施登宇 裴育峰[3] 

机构地区：[1]上海理工大学能源与动力工程学院热能工程研究所,上海200093 [2]上海机易电站设备有限公司,上海200437 [3]中国电力工程顾问集团东北电力设计院,吉林长春130021

出　　处：《热能动力工程》2016年第8期69-74,124-125,共6页Journal of Engineering for Thermal Energy and Power

基　　金：国家科技支撑计划基金资助项目(2012BAA04B01);上海市科学技术委员会地方院校能力建设基金资助项目(12230502600);沪江研究基地专项基金资助项目(D14001)

摘　　要：对五彩湾原煤及加入胶体添加剂后的混合煤样进行燃烧实验,并分别检测了原煤和煤灰中钠元素的含量,确定了五彩湾煤中钠在燃烧过程中的析出规律以及胶体添加剂对其的影响。并且对部分煤灰采用XRD(X射线衍射仪)进行分析。研究结果表明,在原煤燃烧过程中,钠的析出量随着温度的升高而增大,在1 100℃时达到最大值。XRD分析结果表明:适量硅溶胶的添加可将五彩湾煤中可挥发性钠转化成硅铝酸钠等高熔点含钠化合物,从而减少了五彩湾煤中钠的析出;在800℃燃烧温度下,适量铝溶胶的添加也可将可挥发性钠转化为不可挥发性钠,从而减少钠的析出;而在1 000℃燃烧温度下,添加铝溶胶后所对应的灰样中并没有生成硅铝酸钠等高熔点含钠化合物,而是生成了高岭石等物质。The combustion experiments of the Wucaiwan raw coals and the sol-treated coals were conducted. The contents of sodium contained in the raw coals and the coal ashes were measured respectively. The emission behaviors of the sodium contained in the raw coals and the treated coals during combustion and the influence of colloid additive were determined. Some of the coal ashes were examined by XRD. Results show that the emission of sodium increases with temperature,and the emission of sodium reach the maximum at 1 100 ℃. The results of XRD show that adding appropriate amount of silica sol can transform the volatile sodium into sodium aluminum silicate to reduce the emission of sodium in wucaiwan coal during combustion. When the combustion temperature is 800 ℃,adding appropriate amount of aluminum sol can also transform the volatile sodium into sodium silicate to reduce the emission of sodium in wucaiwan coal during combustion. However,when the combustion temperature is 1 000 ℃,after adding aluminum sol to the corresponding sample,there are kaolinite and other substances generated rather than sodium aluminum silicate in the coal ashes.

关 键 词：五彩湾煤 钠 燃烧 胶体添加剂 析出规律 

分 类 号：TQ534[化学工程—煤化学工程]