Crystallisation unit

The pellets of some polymer types are very sticky and tend to agglomerate when too warm, or they need certain reaction times for crystallisation. Heat transmission from the pellets to the much cooler process water is relatively slow whereas transport of pellets in the process water pipe can be very fast (a few seconds depending on the pipe length). The dwell time of the pellets in the process water can be increased significantly, up to several minutes, by using this crystallisation unit. As a result, very cold and/or crystallised pellets enter the dryer. The dwell time of the pellets in the water depends on the size of water pump and the length and diameter of the pipe of the crystallisation unit.