压力对湍动循环流化床煤气化的影响分析  

Influence of pressure on turbulent CFB coal gasification

作　　者：段锋[1,2] 金保升[1] 黄亚继[1] 李斌[1] 孙宇[1] 章名耀[1] 

机构地区：[1]东南大学热能工程研究所,南京210096 [2]安徽工业大学冶金与资源学院,马鞍山243002

出　　处：《东南大学学报（自然科学版）》2010年第2期397-401,共5页Journal of Southeast University：Natural Science Edition

基　　金：国家重点基础研究发展计划(973计划)资助项目(2007CB210208);江苏省"青蓝工程"基金资助项目(JS0801);东南大学优秀青年教师资助项目(4003001012);安徽省高等学校优秀青年人才基金资助项目(2009SQRZ073)

摘　　要：在实验室规模的湍动循环流化床试验装置上,以高温预热空气和水蒸气为气化剂进行了加压煤气化特性试验,考察了湍动循环流化床气化的可行性及其操作参数,并研究了气化炉压力对煤气化行为的影响.研究结果表明：压力能改善气化炉床内流化质量,提高了碳转化率,从而影响煤气热值.气化压力由常压提高到0.3M Pa时,煤气热值提高15%,碳转化率由57.52%增加到76.76%,干煤气产率和冷煤气效率也随压力增大而小幅增大.对于特定的循环流化床气化工艺,气化压力存在最佳气化效果区域,在本实验条件下,0.3-0.4M Pa时气化效果最佳.Using high temperature preheated air and steam as gasifying agent,coal gasification experiments are performed in a pressurized turbulent circulating fluidized bed（CFB） gasification pilot plant in order to investigate the pressurized gasification process and estimate its potential.The test facility as well as its operation behavior is described.Furthermore,the parameter pressure is investigated regarding to its influence on the producer gas composition.The study results show that the gasification quality is improved at elevated pressure because of the better fluidization in the reactor.Coal gasification at a higher pressure shows advantages in lower heat value and carbon conversion.The gas heating value is increased by 15% when the gasifier pressure increases from 0.1 MPa to 0.3 MPa.Increasing the gasifier pressure would increase the carbon conversion from 57.52% to 76.76%.The dry gas yield and the efficiency of cold gas increase a little with the increase of the gasifier pressure.There exists an optimal gasifier pressure for a certain CFB coal gasification process.For the test condition,a pressure of 0.3 to 0.4 MPa produces optimal gasification effect.

关 键 词：湍动 循环流化床 煤气化 加压 

分 类 号：TM223[一般工业技术—材料科学与工程]