Abstract
A mixing characteristics of continuous solid mixer was studied by use of tracer response method under various operating conditions.
An agitator shape used in this work was a rotary type that was divided a continuous double herical ribbon into smaller height sections and arranged with separation, distance hscm.
The following results were obtained:
1) In the case of large hold-up, the back-flow mixing between the stages could be considerably reduced by the set of a suitable space between each ribbon.
2) The mixing region was obtained individually in each stage in the case of higher ribbon distance than 6cm and the experimental response curves were well explained by means of perfect mixers in series model.
3) The effect of the flow rate on the degree of mixedness was almost negligible. The mixing characteristics was improved as the rotating speed increased and in the case of N>100r.p.m., the mixing condition was desirable.
4) As the number of ribbon stage increased, the degree of mixedness was become better. The degree of mixedness in the outlet stream reached the fimal degree of mixedness by employing 3 stages for RA-type ribbon and 2 stages for RB-type ribbon, respectively.
