粉煤加压密相输送特性试验研究  

Experimental Investigation on Flow Characteristics of Pulverized Coal Dense-phase Pneumatic Conveying at High Pressure

作　　者：范春雷[1] 陈晓平[1] 赵长遂[1] 梁财[1] 蒲文灏[1] 鹿鹏[1] 从俊[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实验室,江苏南京210096

出　　处：《锅炉技术》2008年第1期10-13,60,共5页Boiler Technology

基　　金：国家重点研究发展计划资助项目(2004CB217702)

摘　　要：在压力可达4.0 MPa,固气比高达500 kg/m3的气力输送试验台上进行粉煤输送试验。分别在不同的输送差压、充压风量和流化风量等条件下进行了输送试验,考察操作参数对煤粉质量流量和固气比等气力输送特征参数的影响。结果表明,煤粉的质量流量随着输送差压和输送风量的增大而增大;固气比随着输送差压和充压风量的升高而增加,随着流化风量的增大先增大后减小;总风量不变时,当Qf<0.7 m3/h时,充压风量的变化对输送参数的影响起主导作用,当Qf>0.7 m3/h时,流化风量的变化对输送参数的影响较大。Experiments of pulverized coal dense-phase pneumatic conveying using nitrogen were carried out in an experimental setup at the pressure up to 4 MPa and the solid-gas ratio up to 500 kg/m^3. The influences of fluidizing gas flow rate, pressure, pressurizing gas flow rate and total conveying pressure drop on the solid-gas ratio and the solid mass flow rate were investigated. The results indicated that pulverized coal mass flow rates increase with the increase in total conveying differential pressure or pressurized gas flow rate rise, and increase at first and then declines as fluidizing gas flow rate increases. Under constant gas volume flow rate in the range of Qf〈0.7 m^3/h, conveying characteristic parameter is mainly influenced by the gas volume flow rate for keeping pressure; but in the range of Qf〉0. 7 m^3/h, fluidizing gas volume flow rate becomes the dominant factor.

关 键 词：气力输送 高压 浓相 固气比 质量流量 

分 类 号：TQ54[化学工程—煤化学工程]