| 摘要 |
A mixture 2 containing a volatile component 1 stands within an evaporator 3 in evaporative contact with a drying primary flow 41 of a carrier gas 4, propelled through the evaporator 3 from a cold end 31 to a hot end 32. A subsidiary flow 42 is diverted from the said primary flow 41 after its exit from the evaporator 3, is supplied with component steam 1" from an external steam source 6 and is returned through the evaporator 3 from the said hot 32 to cold 31 end, heat being delivered to the mixture 2 by way of a partition 5. <IMAGE> |
