文档介绍：Nothing is impossible!
Capacity [kəˈpæsəti] 生产能力
Refinery [rɪˈfaɪnəri] 炼油厂
Vapour [ˈveɪpə(r)] 蒸汽
Velocity [vəˈlɒsəti] 速率
Pumparound [pʌm'pəraʊnd] 循环泵
Column [ˈkɒləm] 塔
. Pre-flash Columns and Crude Column Capacity
粗镏塔和原油塔生产能力
The crude flow rate to the CDU determines the capacity of the whole refinery .
常减压蒸馏装置处理的原油量决定了整个炼油厂的能力。
A crude column is typically designed for 80% loading , which means that the unit can be operated at 20% throughput more than the disign value .
一个原料塔通常设计成80%的装载量,这意味着该单元可以在生产能力超过设计值20%的下进行操作。
The capacity of the column is limited by the vapour flow rate with a velocity between and ft/s ( and ).
。
The vapour flow rate increases as the vapours rise from the flash zone to the overhead.