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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。
Aiming at the situation that the capacity of a natural gas purification plant with a capacity of 200 × 10 ~ 4 m ~ 3 / d increases the circulation of MDEA due to the increase of the content of acidic components, this device may not be able to operate stably. In this study, the flow simulation software ChemCAD 6.0 .1 The process flow was simulated using the FRI TrayRating 1.0.7, HTRIXchanger Suite 4.00 and Pipe Flow Expert 2010 software, respectively on the regeneration system of the MDEA regeneration tower, rich and poor liquid heat exchangers, MDEA reboiler and pump Pipeline calculation and analysis, the results show that, MDEA regeneration tower of the hydrodynamic performance are in the normal range of operation; maintain the number of rich and poor fluid heat exchanger unchanged, the arrangement of two series and transform 4 string can solve the problem of insufficient heat exchange capacity of the equipment; MDEA reboiler heat transfer area is too small lead to insufficient heat exchange capacity, the need to increase the heat exchanger tube bundle to meet the production requirements; As the top of the regeneration tower sour gas outlet pipeline PG- 1109 gas velocity is too large, resulting in pressure regeneration tower appears pressure, by increasing the diameter measures to solve.