Venting through a Flighted Barrel

Kearney and Hold [62] proposed a new devolatilizer with helical flights in the barrel and a smooth screw section (rotor) see Fig. 8.49(b). This device is called a rotating drum devolatilizer (ROD). 

The barrel has multiple helical flights as shown in Fig. 8.49(b). Each turn of the heh-cal channels has an oblong opening following the helical path of the channel. The volatiles are removed through these openings, which are located in the same angular 

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