小粒径低阶煤热解特性试验研究

一第21卷第5期洁净煤技术Vol．21一No．5一一2015年9月Clean Coal Technology Sep.一2015一

小粒径低阶煤热解特性试验研究

白一效一言1,2,3

(1.煤炭科学技术研究院有限公司煤化工分院,北京一100013;2.煤炭资源高效开采与洁净利用国家重点实验室,北京一100013;3.国家能源煤炭高效利用与节能减排技术装备重点实验室,北京一100013)

摘一要:为优化小粒径低阶煤热解工艺参数,以典型小粒径长焰煤为研究对象,结合热重分析,利用1kg 外热式固定床热解装置,考察了热解温度对热解产品产率及质量的影响三结果表明:500~750?时,随着热解温度升高,半焦产率降低,煤气产率升高,煤气中H 2含量不断增加,最高为44．64%,CH 4含量不断降低,为28．83%~38．55%;焦油产率先升后降,在700?时达到最高三物料热解过程中发生粉化,炉壁温度高于650?以后,物料粉化现象加剧,粉末比例迅速增加,因此最终确定小粒径神木煤适宜热解温度为600~700?三

关键词:小粒径;低阶煤;热解特性;热解温度

中图分类号:TQ52一一一文献标志码:A一一一文章编号:1006-6772(2015)05-0076-04Experimental research on pyrolysis characteristics of small particle size low rank coal BAI Xiaoyan 1,2,3

(1.Beijing Research Institute of Coal Chemistry ,Coal Science and Technology Research Institute Co.,Ltd.,Beijing 一100013,China ;2.State Key Laboratory of Coal Mining and Clean Utilization ,Beijing 一100013,China ;3.National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control ,Beijing 一100013,China )

Abstract :Based on the thermogravimetry analysis of typical small particle size long flame coal,effect of pyrolysis temperature on product yield and quality were researched using 1kg external -heated equipment.The results showed that semicoke yield decreased and coal gas yield increased as the final pyrolysis temperature rised from 500?to 750?.The proportion of H 2continuously increased with the highest of 44.64%,the change of CH 4was opposite with the value of 28.83%to 38.55%.The coal tar yield rose first,then fell,it reached the

maximum at 700?.Particle pulverization happened during pyrolosis,and reinforced obviously when the temperature was higher than 650?.The suitable pyrolysis temperature ranged from 600?to 700?for small size Shenmu coal.Key words :small particle size;low rank coal;pyrolysis characteristic;pyrolysis temperature 收稿日期:2014-10-10;责任编辑:白娅娜一一DOI :10.13226/j.issn.1006-6772.2015.05.018

基金项目:中国煤炭科工集团有限公司科技创新基金资助项目(2013ZD007);煤炭科学研究总院技术创新基金资助项目(2012CX01)作者简介:白效言(1987 ),男,山东济宁人,助理研究员,硕士,从事煤炭热解方面的科研工作三E -mail :bxy268@https://www.360docs.net/doc/e75322558.html,

引用格式:白效言.小粒径低阶煤热解特性试验研究[J].洁净煤技术,2015,21(5):76-79.

BAI Xiaoyan.Experimental research on pyrolysis characteristics of small particle size low rank coal[J].Clean Coal Technology,2015,21(5):76-79.0一引一一言

煤炭资源中,褐煤及长焰煤二弱黏煤二不黏煤等

低变质烟煤约占55%,据估计蕴藏其中的挥发分相

当于1000亿t 的油气资源[1]三热解是煤炭加工的最主要工艺之一,高挥发分低阶煤通过热解可有效

提取其中的油气产品,并获得高品质半焦[2]三油气产品进一步深加工,可以生产多种燃料和化工产品,

而半焦则可用于气化造气二燃烧发电二制备高性能碳材料等转化途径,从而形成以热解为龙头,高效清洁的煤化工多联产产业链三目前已形成了多种煤热解工艺技术,包括直立炉二固体热载体干馏工艺二多段回转炉热解工艺二流化床二旋转床热解技术等[3-10],但是大部分低阶煤热解技术还处于实验室研究和中

试放大阶段,除了直立炉热解技术以外均未实现真

正意义的工业化运行[11]三陕北低变质煤主要采用67