新型导向复合塔板的性能研究

Performance of New Flow-Guided Compound Tray

结合导向筛板与规整填料的优点,开发出具有导向功能的新型导向复合塔板。在内径60cm的玻璃塔中,采用氧气-水物系进行了实验,考察了导向复合塔板的塔板压降、雾沫夹带、漏液、单板氧解析效率等流体力学性能和传质性能,并与F1型浮阀塔板及导向固定阀塔板的性能进行了比较。由实验数据关联得到了干板压降、湿板压降和雾沫夹带率的经验式。实验结果表明,导向复合塔板的干板压降为50～200Pa,湿板压降为700～1100Pa,液流强度低于5.263m3/(m.h)时雾沫夹带率小于10%,筛孔气速大于7.9m/s时漏液率几乎为零,单板氧解析效率保持在80%以上;导向复合塔板的总体性能优于F1型浮阀塔板和导向固定阀塔板。

Combining advantages of both flow-guided sieve tray and structured packing, a new flow-guided compound tray was set up. Hydrodynamics of the new tray, including pressure drop, entrainment, weeping and mass-transfer efficiency, were studied with an oxygen-water system in a 60 cm inner diameter glass column. The behavior of the system was compared with those of flowguided fixed valve tray and F1 valve tray. Empirical equations on tray pressure drop and entrainment were obtained. For the flow-guided compound tray, dry pressure drop is about 50 - 200 Pa, wet pressure drop is about 700 - 1 100 Pa, entrainment rate is less than 10% of total flow when liquid flow strength less than 5. 263 m3/（ m·h）, weeping is almost zero when gas velocity of the hole more than 7.9 m/s, and mass-transfer efficiency is maintained above 80%. The overall performance of the flow-guided compound tray is superior to F1 valve tray and flow-guided fixed valve tray, especially in respect of pressure drop and mass transfer efficiency.