天然气脱硫装置再生系统的优化研究  

Optimization of gas desufurization equipment regeneration system

作　　者：赵聪[1] 范峥[2] 李稳宏[1] 闫昭[3] 贾浩民[3] 陈秀娜[1] 

机构地区：[1]西北大学化工学院,陕西西安710069 [2]西安石油大学化学化工学院,陕西西安710065 [3]长庆油田第一采气厂,陕西榆林718500

出　　处：《计算机与应用化学》2013年第1期81-84,共4页Computers and Applied Chemistry

摘　　要：针对某天然气净化厂处理量为200×10~4 m^3/d装置因酸性组分含量增加而加大MDEA循环量,可能导致该装置不能稳定运行的情况,本研究利用流程模拟软件ChemCAD 6.0.1对该装置进行了流程模拟,并利用FRI TrayRating 1.0.7、HTRIXchanger Suite 4.00及Pipe Flow Expert 2010软件分别对再生系统的MDEA再生塔、贫富液换热器、MDEA重沸器及机泵管线进行核算与分析,核算结果表明,MDEA再生塔的各项流体力学性能均在正常运行的范围内;维持在役贫富液换热器台数不变,将其排列方式由2串两并改造为4串可以解决该设备换热能力不足的问题;MDEA重沸器换热面积过小导致换热能力不足,需要增加换热管管束才能满足生产要求;由于再生塔顶部酸气出口管线PG-1109的气速过大而导致再生塔出现憋压,可通过增大管径措施解决。For the increase of MDEA circulation quantity as the acid components had become higher of the natural gas purification plant whose production capacity was 200×10^4 m^3/d, the system could not work normally. Under the circumstances, the whole flowsheeting of regeneration system in desulfurization process was simulated. Several devices including regeneration tower, lean/rich heat exchanger, MDEA reboiler and pipelines were calculated and analyzed by virtue of FRI Tray Rating 1.0.7, HTRI Xchanger Suite 4.00 and Pipe Flow Expert 1.12, respectively. The final results showed that the performance parameters of MDEA regeneration tower were in the range of normal production. The insufficient of lean/rich heat exchanger would be solved by changing the arrangement of two parallel groups containing two in series for each one to four devices in series maintaining the device number. The increase of tube bundle would meet the system demand to remedy the lack of heat transfer area of MDEA reboiler. The velocity of PG-1109 pipelines for sour gas outlet located in the top of the regeneration tower was so fast that it would result in the pressure oppression. The measure of enlarging its diameter might reduce the overquick speed effectively.

关 键 词：MDEA再生塔 贫富液换热器 MDEA重沸器 管线 

分 类 号：TE645[石油与天然气工程—油气加工工程]