五彩湾煤中钠在燃烧过程中的迁移释放规律  

Transformation and release of sodium in Wucaiwan coal during combustion

作　　者：刘大海[1] 张守玉[1] 涂圣康 金涛[1] 施大钟 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：《化工进展》2015年第3期705-709,共5页Chemical Industry and Engineering Progress

基　　金：国家科技支撑计划项目(2012BAA04B01)

摘　　要：采用不同萃取液对新疆准东高钠煤进行逐级萃取实验,分析了煤中钠的存在形式。分别检测了不同温度下五彩湾煤原煤以及815℃下不同萃取方式处理的煤燃烧后煤灰中钠的含量,研究了五彩湾煤燃烧过程中钠的迁移释放规律。并且对传统灰分分析方法和微波消解-电感耦合等离子体原子发射光谱仪分析法(微波消解-ICP-AES分析法)测量煤中钠含量进行了比较。实验结果表明,新疆高钠煤中钠主要为水溶钠。五彩湾煤燃烧过程中,钠的释放主要发生在815℃之前,并且以水溶钠和有机钠的释放为主。不同存在形式的钠在燃烧中存在转化,主要表现为水溶钠向不可溶钠的转化以及不可溶钠向有机钠的转化。通过比较,微波消解-ICP-AES分析法对煤中钠含量的分析更准确。The existence forms of sodium in high sodium content coals from Zhundong area in Xinjiang Uygur Autonomous Region,China,were determined with the three-step-extraction method.The contents of sodium in Wucaiwan coal ash prepared at different temperatures and the treated coals ash prepared at 815℃ were measured. Release and transformation of sodium in coal were investigated during combustion process. The traditional determination method was compared with the analysis method by microwave digestion and inductively coupled plasma atomic emission spectrometry. Most of sodium in Wucaiwan coal existed mainly in the form of water-soluble sodium. During the combustion process,release of sodium from coal samples,especially water soluble sodium and ammonium-acetate soluble sodium,mainly took place ahead of 815℃. There was transformation among different forms of sodium during the combustion process. The main transformations were water soluble sodium to insoluble sodium and insoluble sodium to organic sodium. The analysis method by microwave digestion and inductively coupled plasma atomic emission spectrometry for measuring sodium in coal was more accurate.

关 键 词：高钠煤 萃取 钠 存在形式 燃烧 迁移 

分 类 号：TQ536.1[化学工程—煤化学工程]