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Experimental model equipment scheme and procedure

The main parameters for the experimental equipment and system design are listed below  [Pg.138]

Dry PVC powder is used as the process material for all the experiments in the first stage of the investigation, the properties of which are the following  [Pg.139]

Before each run, the dry PVC powder taken from a factory is mixed with water in a certain proportion the mixture is sealed with plastic film for over 24 h to restore the PVC s moisture content uniformly. [Pg.139]

The relationship between the feed rate of the wet PVC and the rotary speed of the screw feeder was calibrated prior to all the experiments. [Pg.139]

In each run, the annular chamber of the dryer is first filled with a certain amount of dry PVC powder and then the hot airflows I and II are turned on to preheat the system. When the temperature of the material inside the dryer achieves the required value, the screw feeder is turned on and the experimental operation begins. About one hour later, when operation of the system achieves stable conditions, sampling is started and, at the same time, the dry- and wet-bobble temperatures at the inlet and the outlet of the dryer, the flow rates of Hot air I and II, and the rotary speed of the screw feeder are recorded. [Pg.139]


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