摘要
研究了稻草及不同温度热解半焦颗粒在内径100mm、高1000mm的有机玻璃流化床中的流化特性.结果表明,稻草颗粒无法单独流化,而其热解半焦颗粒可单独流化;半焦颗粒的最小流化速度随粒径增大而增大,与床层高度无关,筛分粒径为0.45～0.9,0.18～0.45,0.125～0.18mm的半焦颗粒的最小流化速度分别为0.19,0.16,0.14m/s;300～550℃温度范围内稻草热解半焦颗粒的流化特性无明显区别;半焦与稻草颗粒混合流化时,稻草颗粒不大于20%(ω)时床层有较好的流化质量,混合颗粒的最小流化速度都随混合颗粒中稻草含量增大而增大.
Fluidization characteristics of straw and semi-char particles were investigated in a fluidized bed with I.D. of 100 mm and height of 1000 mm. The results show that straw particles can not be fluidized alone, but the semi-char particle fluidized well. The minimum fluidization velocities of semi-char particles increase with the particle size, but they are independent of the bed height, the minimum fluidization velocities of semi-char particles （with the sizes of 0.45-0.90, 0.18-0.45, 0.125-0.18 mm） are 0.19, 0.16, 0.14 m/s. The fluidization characteristics of semi-char particles at different temperatures （300-550 ℃） are similar. The fluidization characteristics of the mixture are well as long as the mass fraction of straw is less than 20%, but the minimum fluidization velocities of the mixture increase with the mass fraction of straw in the mixture.
出处
《过程工程学报》
CAS
CSCD
北大核心
2010年第1期46-50,共5页
The Chinese Journal of Process Engineering
基金
教育部长江学者与创新团队发展计划基金资助项目(编号:PCSIRT-IRT0620)
上海市科技创新行动计划基金资助项目(编号:08DZ1200200)
上海市优秀学科带头人计划资助项目(编号:08XD1401300)
关键词
流化床
稻草
半焦
流化特性
fluidized bed
straw
semi-char
fluidization characteristics
