压力对加压煤气化过程中氮释放的影响  

Influence of pressure on the release of nitrogen during pressurized gasification of coal

作　　者：刘安琪[1] 赵增立[1] 武宏香[1] 王小波[1] 郑安庆[1] 李海滨[1] 张尚武[2] 黄戒介[2] 

机构地区：[1]中国科学院广州能源研究所中国科学院可再生能源与天然气水合物重点实验室,广东广州510640 [2]中国科学院山西煤炭化学研究所山西省粉煤气化工程研究中心,山西太原030001

出　　处：《燃料化学学报》2013年第1期14-19,共6页Journal of Fuel Chemistry and Technology

基　　金：国家高技术研究发展计划(863计划;2008AA050302-06);中国科学院广州能源所所长基金(o807pk1001)

摘　　要：为了解大型加压煤气化过程中污染物分布状态及其影响因素,着重研究了压力对加压大型煤气化过程中氮释放的影响。对晋城无烟煤在φ800 mm加压灰熔聚流化床煤气化实验进行跟踪采样分析,水蒸气和氧气作为气化介质(Steam/O2≈3/1,体积比),气化炉内反应温度为1 000℃,考察0.6、1.0、1.5、2.0 MPa四种气化压力下氮化物在产物中的分布。结果表明,氮元素主要分布在气相产物中,随着气化压力增大固相产物中的氮含量增加,气相产物的氮含量先增加,在1.0 MPa以后呈现略微下降的趋势,并通过对比分析晋城无烟煤和气化底渣的氮赋存形态,从微观层面进一步探讨压力对氮分布规律的影响方式。A comprehensive knowledge of the release characteristics of inorganic compounds is required by the designing of gas scrubbing and hot gas cleaning technology. The principal objective of this work was to examine the influence of pressure on the release of nitrogen during pressurized coal gasification in a pilot-scale pressurized ash agglomerating fluidized bed facility with 800 mm i. d.. Jincheng anthracite was gasified at gage pressures of 0.6, 1.0, 1.5 and 2.0 MPa with steam/O2（3/1, volume ratio） at 1 000 ℃. The analysis of nitrogen content and form in hot gas and solid by-product was carried out. The quantitative analysis results show that most of nitrogen is transferred into gas phase, which is slightly changed after 1.0 MPa coupled with an enrichment of nitrogen in solid phase with the increase in pressure. The discussion on the mechanism of nitrogen release at pressure was carried out by contrast analysis of nitrogen form in the coal and bottom ash at microcosmic level.

关 键 词：煤气化 压力 氮 

分 类 号：TQ541[化学工程—煤化学工程]