双层喷射立体传质塔板在催化裂化分馏塔的应用

 介绍了一种新型双层喷射立体传质塔板，该塔板具有雾沫夹带量低、液相通量大、塔板压力降低的特点，并在中国石油华北石化分公司催化裂化分馏塔上进行了应用。结果表明，该塔板可以大幅度提高塔内气、液相流体的负荷，提高装置的处理能力，而且塔板压力降低，塔板效率高，空塔动能因子可以达到3.2 (m/s)·(kg/m3)0.5，降液管溢流强度可以达到130 m3/（m.h）。分馏塔产品汽油95％点与柴油5％点脱空达到34 ℃，柴油95％点与回炼油5％点脱空达到30 ℃，油浆5％点蒸馏温度达到415 ℃。

APPLICATION OF COMBINED TRAPEZOID DOUBLE SPRAY TRAY IN FCC MAIN FRACTIONATOR

A new combined trapezoid double spray tray (CTDST) was developed for high gas phase and high capacity gas-liquid mass transfer operation. The structure of double spray tray could reduce the initial speed of the spray droplet, the pressure drop of the tray and the tray entrainments could be improved effectively. The application of CTDST in the FCC fractionation tower of Huabei Petrochemical Company showed that the gas-liquid flow rate in the tower was high, the processing capacity increased significantly, the pressure drop of the tray was low and the separation efficiency was high; the kinetic factor of empty column reached 3.2 (m•s-1)•(kg•m-3)0.5 and the kick volume of downcomer reached 130m3•m-1•h-1. The gap between the 95% cut point of gasoline and 5 % cut point of diesel fuel, and the gap between the 95% cut point of diesel fuel and 5 % cut point of recycle oil were 34 ℃ and 30 ℃, respectively. The 5 % cut point of slurry oil reached 415 ℃.