Cryopulverizing packed bed control system

摘要

A control system for optimizing the flow of a cryogenic refrigerant into the precooler and mill of a cryopulverizing system including means responsive to a change in the discharge temperature in the mill for introducing refrigerant into the mill in direct proportion to such temperature change and means responsive to the change in discharge temperature in the mill for introducing refrigerant into the precooler at a linear rate proportional to the product of the material feed rate and the change in discharge temperature and inversely proportional to the residence time of the feed material in the precooler.