公开(公告)号：US06887345B2

公开(公告)日：2005-05-03

申请号：US10432093

申请日：2001-11-20

申请人： Ismo Hirvonen ,  Randy Stern

发明人： Ismo Hirvonen ,  Randy Stern

IPC分类号： B01D1/06 ,  B01D1/22 ,  B01D3/06 ,  D21C11/10

CPC分类号： B01D1/065 ,  B01D1/22 ,  B01D3/06 ,  D21C11/10 ,  Y10S159/08 ,  Y10S159/32

摘要： The present invention relates to a process and a device for evaporating liquids, for example black liquor from cellulose cooking, which contain solid and dissolved substances which are to be concentrated. The liquid is heated to close to boiling temperature in a heat exchanger (1) of the falling-film type. The process is characterized in that the pressure on the liquid side in the falling-film heat exchanger (1) is kept so high that boiling does not take place in this heat exchanger and in that the evaporation takes place, by means of flashing, in a separate expansion tank (7) that has a lower steam.

摘要翻译： 本发明涉及用于蒸发液体的方法和装置，例如来自纤维素烹饪的黑液，其含有待浓缩的固体和溶解物质。 在降膜型热交换器（1）中将液体加热至接近沸腾温度。 该方法的特征在于，降膜热交换器（1）中的液体侧的压力保持如此高，使得在该热交换器中不会发生沸腾，并且通过闪蒸发生蒸发 具有较低蒸汽的单独的膨胀箱（7）。