循环流化床煤燃烧/热解双反应器压力分布的实验研究

实验测量了一种新型的循环流化床煤燃烧/热解冷模反应器中提升管及立管内的压力分布，其中提升管的内径为100 mm、高为6 m;立管内径为44 mm、高为3 m，热解室的截面为200 mm×200 mm、高为770 mm。分别考察了提升管内的表观气速Ur、循环量Gs、加到热解室内的松动气量Qa以及初始装料量G等对系统压力分布的影响。结果表明，在立管底部阀门开度不变的情况下随着Ur的增加，提升管及立管内的压力梯度都趋于减小；在提升管内表观气速一定的情况下随着循环量Gs的增加，提升管及立管内的压力分布也随之增大；加到热解室内的松动气对立管内的压力分布影响较大，而对提升管内的压力分布影响相对较小；在立管底部阀门开度及Ur一定的情况下，随着初始装料量的增加提升管及立管内的压力分布也趋于增大。

Experimental study on the pressure distribution of a CFB reactor combined with a coal pyrolysis reactor

Pressure distribution of the riser and the standpipe of a cold model CFB (Circulating Fluidized Bed) reactor combined with a coal pyrolysis reactor was studied by using sixteen channels pressure sensors. The riser column is 0.1 m in diameter and 6 m in height. And the standpipe is 0.044 m in diameter and 3 m in height. The rectangle pyrolysis chamber that has a cone-shaped gas distributor with a cross section of 200 mm×200 mm and 0.77 m in height lays between the cyclone dipleg and the standpipe. The effects of the superficial gas velocity in the riser, the circulating rate, the aeration to the pyrolysis chamber and the initial inventory on the pressure distribution of the system were investigated. The results showed that the pressure gradient in the riser and standpipe was gradually decreased with the superficial gas velocity, while it was increased with the circulating rate at the constant superficial gas velocity. The effect of the aeration to the pyrolysis chamber on the pressure distribution of the standpipe was more remarkable than on the riser. Moreover, increasing the initial inventory would lead to the increase of pressure distribution of the riser and the standpipe.