在逆流旋转填料床中用水吸收挥发性有机化合物异丙醇气体，考察了超重力因子（β）、空床气速（u）、液体喷淋密度（q）、异丙醇气体进口体积分数等操作参数对异丙醇气相总体积传质系数（K_Ga）和吸收率（E）的影响。结果表明，异丙醇气体的K_Ga随着β、u和q的增大而增大，且异丙醇气体进口体积分数对K_Ga、E的影响较小；E随着β、q的增大而增大，但随着u的增大而降低。在β=60、u=0.9 m/s、q=15.92 m³/（m²·h）、异丙醇进口体积分数为10 000 μL/L时，吸收率为96%，K_Ga达21.7 s^-1，是板填料式逆流RPB的2.1~3.2倍，是板填料式错流RPB的4~6.2倍，表明逆流旋转填料床可有效强化吸收异丙醇气体。

Isopropanol gas is adsorbed by water in a countercurrent rotating packed bed (RPB).The effects of operating parameters on the total volumetric mass transfer coefficient K_Ga and absorption rate E of isopropanol gas are explored,including high-gravity factor β,empty bed gas velocity u,liquid spray density q and isopropanol gas inlet concentration.It is found that K_Ga value increases with the increases of β,u and q.Isopropanol gas inlet concentration has small impact on K_Ga and E.Absorption rate E will increases as β and q increase,but decrease as u increases.Under the conditions that β=60,u=0.9 m·s^-1,q=15.92 m³/(m²·h) and the inlet concentration of isopropyl alcohol is 10 000 ppm,the absorption rate of isopropyl alcohol can reach 97%,K_Ga value reaches 21.7 s^-1,which is 2.1-3.2 times that in a countercurrent RPB with blade packing,4-6.2 times that in a cross-flow RPB with blade packing.It illustrates that countercurrent RPB can effectively enhance the mass transfer process when absorbing isopropanol gas.

张春阳(1994-),男,硕士研究生,主要从事VOCs气体净化研究,1006541596@qq.com