加压喷动流化床最小喷动速度的试验研究  

Experimental Study of the Minimum Spouting Velocity in a Pressurized Spouted-fluidized Bed

作　　者：李乾军[1] 章名耀[1] 施爱阳[1] 

机构地区：[1]东南大学洁净煤发电及燃烧技术教育部重点试验室,江苏南京210096

出　　处：《热能动力工程》2008年第1期46-49,共4页Journal of Engineering for Thermal Energy and Power

基　　金：国家重点基础研究发展计划(973)基金资助项目(G199902210535;2004CB217702);国家自然科学基金资助项目(2004CB217702;2005CB221202;2006CB20030201;2006CB705806)

摘　　要：在内径100mm的有机玻璃冷模装置上进行了加压喷动流化床试验。床料直径为1.6mm、2.3mm的小米。研究了压力、静止床高及流化风对最小喷动速度的影响。试验结果表明:喷动流化床的最小喷动速度随压力的增大而减小,但减小幅度逐渐变小;静止床高增大,最小喷动速度增大,但床高的增加对最小喷动速度的影响随着压力的增大而减弱。流化风风量增加导致最小喷动速度降低。根据试验数据进行了线性回归,分别得出了uf=0和uf>0(uf为流化风床内表观气速)时最小喷动速度的关联式,相关系数分别为0.964和0.920,关联式和试验值吻合较好。A pressurized spouted-fluidized bed experiment was performed on an organic-glass cold model device with an inner diameter of 100 mm.Millet having a diameter of 1.6 mm and 2.3 mm respectively was used as the bed material.The influence of pressure,static bed height and fluidized air on the minimum spouting velocity was studied.The test results show that the minimum spouting velocity in a spouted-fluidized bed decreases with the increase of pressure,but the margin of such a decrease will gradually diminish.When the static bed height increases,the minimum spouting velocity will also increase.The influence of any increase of bed height on the minimum spouting velocity,however,becomes weakened with an increase of pressure.The increase of fluidized air quantity can lead to a decrease of the minimum spouting velocity.Based on the experimental data,a linear regression was conducted,and the minimum spouting velocity correlation formulae were obtained respectively when uf equals to and is greater than 0(uf represents the apparent air velocity in the fluidized air bed)with their correlation coefficients being respectively 0.964 and 0.920.The results obtained from the correlation formulae are in relatively good agreement with those of the experimental measurements.

关 键 词：喷动流化床 加压 最小喷动速度 

分 类 号：TQ051.13[化学工程]