新疆高钠煤脱钠提质过程中钠存在形式  

Existence form of sodium in the high sodium coals from Xinjiang during its sodium removal process

作　　者：刘大海[1] 张守玉[1] 陈川[1] 涂圣康 金涛[1] 郑红俊[1] 吴巧美[1] 邓文祥[1] 唐文蛟[1] 施大钟 吕俊复[3] 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]上海机易电站设备有限公司,上海200437 [3]清华大学热科学与动力工程教育部重点实验室,北京100084

出　　处：《煤炭学报》2014年第12期2519-2524,共6页Journal of China Coal Society

基　　金：国家"十二五"科技支撑计划资助项目(2012BAA04B01)

摘　　要：为解决新疆高钠煤在燃烧利用过程中引起的结渣和沾污等问题,研发了一种洗涤溶液且对该溶液脱除新疆高钠煤中钠效果以及脱钠过程中钠存在形式进行了评估实验。结果表明:中国新疆高钠煤中的钠主要以水溶钠为主,有机钠和不可溶钠含量较少。工艺条件对脱钠效果的影响因煤种而有所不同。水溶钠的脱除主要与洗涤溶液用量和温度有关;粒径的减小和温度的提高能促进高钠煤中有机钠的扩散。在合适的工艺条件下高钠煤中大部分水溶钠和大约1/2有机钠被脱除,钠脱除效率达到50%以上。In order to overcome heavy slagging and fouling on heating surface during the combustion of the high sodium coals from Xinjiang Uygur Autonomous Region,a method for sodium removal from high-sodium coals using a washing solution was presented. The effects of coal particle size,washing medium amount,washing time,and temperature on the sodium removal from high-sodium coals and the existence form of sodium during its sodium removal process were discussed. The results indicate that the sodium exists in the coals mainly in the form of water-soluble sodium,while the proportions of acid-soluble sodium and insoluble sodium are comparatively smaller. The effects of the processing conditions on the sodium removal from high-sodium coals differ from coal types. The washing medium amount and temperature have great influences on the removal of water-soluble sodium,while the decrease of particle size and the increase of temperature can facilitate the diffusion of organic sodium. After the treatment with right processing conditions,most of water-soluble sodium and about half of organic sodium are removed and the sodium removal efficiency is higher than50%.

关 键 词：高钠煤 脱钠 存在形式 

分 类 号：TQ536[化学工程—煤化学工程]