Fluid Dynamics Study on a Cold Model of Fixed-Bed Fire-Tube Heating Pyrolysis Reactor for Ejection of Solid Char
Fluid Dynamics Study on a Cold Model of Fixed-Bed Fire-Tube Heating Pyrolysis Reactor for Ejection of Solid Char
复制标题
固定床火管加热热解反应器喷射固体焦冷模型的流体动力学研究
DOI：
10.1299/jfst.3.826
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发表时间：
2008
影响因子：
0.8
通讯作者：
Sangil Kim
中科院分区：
文献类型：
--
作者：
Islam M. Rofiqul;H. Haniu;Sangil Kim
为了开发一种简便、经济的固定床火管加热热解反应器脱除固体焦炭的方法，对其冷态模型进行流体力学研究是十分必要的。为此，在热解反应器的冷态模型上进行了两种类型的流体力学实验：(I)利用空气压缩机和人造固体焦来确定反应器中固体焦的喷射压力；(Ii)通过激光多普勒测速(LDV)测量和流动显示试验来研究反应器内固体焦喷射过程中的流动规律。实验结果表明，焦炭喷射压力随表观风速的变化均服从二次多项式。归一化压力应达到1.7左右，相应的归一化表观风速应接近1.0，才能正确地启动从反应器模型中吹出的焦产物。LDV测量和可视化测试确保了在去除固体焦的过程中，螺旋焦出口不能在反应堆腔内产生旋转运动。
To innovate an easy and economic way for removal of solid char product from a fixed-bed fire-tube heating pyrolysis reactor the fluid dynamics studies on its cold model are essential. Thus, two types of fluid dynamics experiments have been carried out on a cold model of the pyrolysis reactor: (i) to determine the ejection pressure of the solid char from the reactor, which was carried out with the help of an air compressor and artificial solid char and (ii) to investigate the flow pattern inside the reactor chamber during ejection of char that was conducted by laser Doppler velocimetry (LDV) measurement and flow visualization test. The experimental results show that variation of char ejection pressure with respect to superficial air velocity always follows a polynomial of second-degree. The normalized pressure should be reached to a value about 1.7 with a corresponding normalized superficial air velocity nearly to 1.0, to be started the char product blown out from the reactor model properly. The LDV measurements and visualization test ensure that the spiral char exit port is not able to create a rotary motion inside the reactor chamber during the removal of solid char.