| 摘要 |
<p>Devolatilisation of molten polymer is carried out using a vertical static mixer (1) which opens directly into a flash tank (4). Expansion of a stripping agent injected at an inlet of the static mixer occurs in the static mixer and the continued shearing causes disengagement of the vapour from the polymer, so that expansion is complete before the polymer enters the flash tank (4) and stripper and volatiles are removed by a pump and condenser arrangement (12) which holds the flash tank at a reduced pressure. Polymer outlets (5,6) are in the floor of the flash tank and have metering pumps (7,8) at their bottom end. <IMAGE></p> |
