A study of entrainment in distillation column for sieve plate

[摘要] The purpose of this investigation was to study. the effect of slot velocity, liquid height, plate spacing and slot concentration on entrainment for perforated plates in fractionation columns. The study was approached first by bubble and drop dynamics with the use of high speed photography, but this has to be abandoned due to time and facility limitations. Instead the conventional method for measuring entrainment was used for 1/8 in. and 1/4 in. holes in 25 and 100 holes concentration per square foot plate.The results obtained for the variation of entrainment with slot velocity were found to form a straight line on log. log. coordinate paper. The individual family of curves of the same plate spacing but with different liquid height were found to be parallel with a slope of 3.5. By knowing two values of entrainment at two slot velocitiesit is possible to calculate the entire curve for all ranges of slot velocity without carrying the experimental. work- This was expressed by:E = A (Vs)nThe values of A are a function of plate spacing and liquid height,which were found to vary from 7.8 x 10(-11) to 1.585 x 10(-8) for the 25hole conentration of 1/4 in. diameter plate with a slope of 3.5.

[发布机构] Rice University