連続気液反応器の液混合特性と圧損失

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In the selection of continuous flow reactor and or its design, it is important to consider the mixing characteristics in the apparatus.　This paper is of the study on the mixing situation of liquid in a rotating disk contactor (R.D.C. type), regarded in general as the reactor with better performance.　At first, experimented the back flow of the horizontal tube flow reactor called R.D.C. by the tracer injection method, regarding as multistage reactor.　Next, investigated the mixing situation in the reactor by the indicial response method and determined Peclet number by the help of Brenner's table with respect to concentration vs time.　In addition, the pressure drop of gas contacted with liquid was measured.　The summary obtained are as follows,　1) The back flow f' or u' was independent of flow rate and increased with the number of rotation up to 1,1OO (r.p.m.), whereas beyond 1,100 it remained constant.　It is likely that the back flow u' was due to the area of gap between the disk and reactor wall.　2) Pe number was determined by use of the following equation ;　c = θ[β√2P(t - (1 / √t))]　It varied with flow rate but it was independent of rotation speed and hold-up of liquid. Under the experimental conditions (Table 2), the empirical formula was obtained.　Pe = 11.3u^0.86　accordingly　E = 3.25u + 5.6　3) The oxidation of Sodium-sulfite solution by oxygen gas was performed in this reactor continuously and the concentration distribution was measured.　Comparing it with the calculated value of Eq. (18), it was found that the diffusion model was applicable to this reactor.　4) Pressure drop of gas through this reactor was measured and it may be expressed as fol1ows ;　⊿P = ⊿P_(N=0) + ⊿P'　⊿P' is the increase of the pressure drop with rotation and it was caused by liquid film which was formed by the rotating disks.　The pressure drop of the reactor is very small but it is apt to cause flooding if the hold-up is greater than 0.3.
山形大学の論文
1964-12-25

連続気液反応器の液混合特性と圧損失

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