摘要
为了研究不同操作工艺参数对加压循环流化床煤气化特性的影响,在加压湍动循环流化床热态实验台上对淮北烟煤进行煤气化试验,试验操作条件:气化炉压力p为0.3 MPa、气化温度t为830～910℃、空气煤质量分数w(空气煤)为0.29～0.4 kg/kg、蒸汽煤质量分数w(蒸汽煤)为0.32～0.53 kg/kg.通过多参数组合变换工况,分别考察试验操作条件对煤气成分和煤气热值的影响.采用宽筛分石英砂作为床料,在试验过程中粗石英砂加剧气化炉提升段下部密相区的扰动程度,同时细石英砂提高上部稀相区颗粒体积分数,加上气化炉本体具有下宽上窄的特征,在一定范围内实现气化炉提升段下部湍动流化,上部环核流动.结果表明,气化炉温度对加压煤气化过程影响最为显著,并在w(空气煤)为0.35 kg/kg、w(蒸汽煤)为0.38 kg/kg时,煤气热值达到最大值4 138.98 kJ/m3.
To discuss the influence of different operating parameters on the gas components and the lower heating value（LHV） of pressurized turbulent circulating fluidized bed（CFB） coal gasification,hot test was successfully realized by multi-parameters operating mode using Huaibei bituminous coal.During the test,the gasification pressure kept 0.3 MPa,the gasification temperature ranged from 830 to 910 ℃,the air/coal ratio ranged from 0.29 to 0.4 kg/kg and the steam/coal ratio ranged from 0.32 to 0.53 kg/kg.In the riser,turbulent fluidization in the dense zone and core-annulus flow in the dilute zone was established by using the wide-screen quartz sands.Experimental results prove the feasibility of a pressurized turbulent CFB coal gasification process.The gasification temperature has the most significant effect on the gasification process.The maximally taking value of the sum of combustible components exists when the air/coal ratio was 0.35 kg/kg and the steam/coal ratio was 0.38 kg/kg.The LHV is 4138.98 kJ/m3 at this moment.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2011年第11期2026-2030,共5页
Journal of Zhejiang University：Engineering Science
基金
国家"973"重点基础研究发展计划资助项目(2007CB210208)
教育部博士点基金资助项目(20070286034)
东南大学优秀青年教师资助项目(4003001012)
