METHOD AND APPARATUS FOR CONTROLLING THE PROPORTION OF LIQUID AND DRY PARTICULATE MATTER ADDED TO A PELLETIZER

摘要

A method and apparatus are provided for controlling the amount of dry particulate matter and liquid added to a rotary pelletizer. A transducer senses a characteristic of the mixed material in the pelletizer. The transducer signal is then conditioned to provide a signal level corresponding to a desired characteristic level and which varies about that level corresponding for example to the variations of pellet size about a desired size. That signal is added to a second signal representing either the actual liquid flow actual dry particulate flow into the pelletizer and modulates that respective flow to maintain the input of either the dry particulate or the liquid material into the pelletizer as necessary. Additionally, a set point signal can be provided as a constant signal representing desired dry particulate in flow or liquid in flow. The dry or the liquid signal also can be derived from the respective actual liquid or dry signal by taking a proper proportion of the other signal.