In normal operation, the liquid of bottom tray flows to 1 st space through downcomer and overflows to 2nd space over the baffle.

• 正常情况下底层塔板液相回流经降液管流入第一空间后再经隔板溢流至第二空间,但在分馏塔负荷太低或在操作波动情况下,易出现第一空间中无液体即干釜现象。