| 摘要 |
<p>Fractional distillation apparatus comprises a fractional distillation column 2, and a first reboiler 4 having vertical boiling passages located at an intermediate region of the column 2. Each boiling passage of the reboiler 4 has (a) an inlet communicating with a header 32 which in turn communicates via conduit 30 with a first set 10 of liquid-vapour mass exchange trays and (b) an outlet at its bottom for a mixture of vapour and residual liquid above a collector-cum-vapour disengagement means 36 comprising a multitude of inclined vanes 38 each having an upturned end portion defining a channel 42. Each channel 42 communicates with an annular trough 44 for collecting the liquid and feeding it to trays below. <IMAGE></p> |
