CONTINUOUS METHOD FOR PARTIALLY CRYSTALLISING A SOLUTION AND A DEVICE FOR CARRYING OUT SAID METHOD

摘要

A partial crystallization apparatus comprises at least one pump (1) to circulate a solution through a heat exchanger circuit (20) comprising a tube (200) in contact with a coolant circuit (22). The heat exchanger circuit contains static mixers for the solution in the form of one or more bends (201) or a chicane that causes crystallized particles to be mixed continuously with the solution as it is circulated. - A partial crystallization apparatus comprises at least one pump (1) to circulate a solution through a heat exchanger circuit (20) comprising a tube (200) in contact with a coolant circuit (22). The heat exchanger circuit contains static mixers for the solution in the form of one or more bends (201) or a chicane that causes crystallized particles to be mixed continuously with the solution as it is circulated. In addition, at least part of the heat exchanger tube's inner walls has a non-stick coating, e.g. of plastic film or a special paint, and the pump can be operated at variable speeds. The initiation of the crystallization process is produced by needles or plates that project into the circulated liquid.