三溢流分隔壁塔板上气含率的研究

在内径为1200mm实验塔中,以空气和水为实验介质,采用电导率法对三溢流分隔壁塔板上的气含率进行了测定,并探讨了塔板上气含率分布的规律。实验结果表明,当塔板上高度低于60mm时,三溢流分隔壁塔板上小鼓泡区内的面平均气含率比大鼓泡区内的大;当板上高度高于60mm时,小鼓泡区内的面平均气含率比大鼓泡区内的小;在塔板上35mm处(气含率的最低测量点),小鼓泡区和大鼓泡区内的气含率分布不均匀性指数的差值最大,随板上高度的增加,该差值逐渐变小并趋于零;在塔板上高度低行125mm处,平面壁面鼓泡区的壁面效应较曲面壁面鼓泡区要弱,板上高度高于125mm后,不同鼓泡区的气含率分布不均匀性指数的差值趋于零。

Study on Gas Hold-up Fraction on Three-Pass Dividing Wall Tray

Gas hold-up fraction on three-pass dividing wall tray with air and water as media was measured in an organic glass column with inner diameter 1 200 mm by means of conductometry.The distribution of the gas hold-up fraction on the tray floor was investigated.The experimental results show that,when the height from tray floor is less than 60 mm,the average gas hold-up fraction in small bubbling area on the three-pass dividing wall tray is higher than that in big bubbling area,and when the height from tray floor is more than 60 mm,the average gas hold-up fraction in small bubbling area is lower than that in big bubbling area.On the plane whose height from tray floor is 35 mm(the lowest height in the test),the difference between the uneven distributions of the gas hold-up fractions in big bubbling area and small bubbling area is the maximum,then becomes smaller with increasing the height,and finally tends to zero.On the plane whose height from tray floor is less than 125 mm,the wall effect of the flat wall bubbling area is weaker than that of the curve wall bubbling area.The differences of the uneven distributions of the gas hold-up fractions on different bubbling areas all tend to zero when the height from tray floor is more than 125 mm.