第45卷第4期
油气处理与加工
石油与天然气化工
CHEMICAL ENGINEERING OF OIL & GAS
维持回流罐或凝结水罐气液两相界面稳定的设计
刘成军赵著禄”温世昌1谷峰
1.中国石油工程建设公司华东设计分公司2.中国石油华北石化公司
摘要精馅塔压力热旁路控制系统的回流罐和重沸器系统的凝结水罐至少有气、液两股进料线，且气相进料介质是可凝的，液相进料介质通常是过冷的，这一特点决定了罐内气、液两相界面必须保持稳定才能保证系统正常操作。举例说明了当气相线和液相线在回流罐或凝结水罐上的开口位置设计不当时，气、液两相界面不能保持稳定，会造成热旁路控制下的塔压大幅度波动或重沸器系统凝结水罐内频繁发生水锤现象，严重影响到精馅系统的正常操作，提出了“气相进气相空间、液相进液相空间”的设计原则。
关键词热旁路冷凝液回流罐凝结水罐蒸汽平衡线液膜稳定中图分类号：TE68文献标志码：B
D0I:10.3969/;.issn.1007-3426.2016.04.001
Design for maintaining the stability of gas-liquid interfacein the reflux
drumorthesteamcondensatepot
Liu Chengjun', Zhao Zhulu , Wen Shichang' , Gu Zheng(1. CPECC East-China Design Branch, Qingdao 266071, China)
(2. PetroChina North China Petrochemical Company, Rengiu 062552, China)
Abstract : Both the reflux drum of the pressure hot vapor bypass control system and the condensate pot of the reboiler system in distillation column system at least have a gas and a liquid feed line , the gas feeding medium is condensable and the liquid feed medium is usually sub-cooled. This characteristic determines the gas-liquid interface in the drum or the pot must be stable to ensure the normal operation of system .Examples are introduced to show the significant fluctuation of the tower pressure under the hot vapor bypass control system , and the water hammer occurred frequently in the condensate pot if the gas or liquid nozzle positions are not well designed , which can lead to the gas. liquid interface instability . The design principle of gas into the gas phase space and liquid into the liquid phase space were put forward finally .
Key words : hot vapor bypass , condensate , reflux drum , condensate pot , steam balance line , liquid film，stability
精馏塔压力热旁路控制方法已被广泛应用于塔顶气相全冷凝的工况，而用蒸汽作热源的重沸器系统常常采用凝结水罐代替疏水阀为重沸器提供液封。尽管两种工艺过程看似关系不大，但有一点却是相同的，即
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回流罐和凝结水罐均有两股进料线，一股为气相线，分别为热旁路线和蒸汽平衡线，另一股为液相线，分别为冷凝液线和凝结水线，且热旁路气体和水蒸气均为可凝，而冷凝液和凝结水通常是过冷的。这一特点决定
作者简介：刘成军（1967一）教授级高工。1989年毕业于成都科技大学化学工程专业，一直从事石油与天然气化工专业的设计工作，曾发表论文40多篇。E-mail：liuchengjun@cnpocei.cn