第46卷第1期
石油与天然气化工
CHEMICAL ENGINEERING OF OIL &. GAS
影响DHX工艺C3收率因素分析及工艺完善
张继东孟硕张海滨卢迪中国海洋石油总公司节能减排监测中心
摘要对国内某120X10*m"/d轻烃国收装置典型的DHX工艺C。收率影响因素进行分析，在不改变现有装置的前提下，借助流程模拟软件AspenHYSYS对工艺全流程建模。对主要操作参数进行分析，权衡C收率与装置的能耗关系。根据分析结果得出，在现有装置条件下，低温分离器最佳操作温度为一42C、重接融塔最佳回流温度为一70C。另外，膨胀机的腾胀比是影响C收率的关键，但是在不新增原料气压编机、外输天然气压缩机的前提下，不宜对膨张机的膨胀比进行调整。同时通过对脱乙烷塔塔顶至重接触塔管线的计算，确定管线中气液两相混输是造成脱乙烷塔塔顶温度波动、管线积液甚至断流现象的主要原因。基于以上分析结果，提出增加C收率的3种措施：①通过增大低温分离器入口换热器的换热面积，降低低温分离器的操作温度；②调整重接触塔进料流程，降低重接触塔塔顶C 的损失；③增加脱乙烷塔塔顶物流气液分离罐，避免管线中气液两相混输，降低管线压力损失。C。收率可由当前的67.1%提升至82.3%，同时有效解决脱乙烷塔温度波动幅度大、管线积液基至断流的现象，增强了装置的安全性和稳定性。
关键词DHXC收率优化LPG
中图分类号：TE868
文献标志码：A
D0I;10.3969/j.issn.1007-3426.2017.01.010
Influencing factors analysis of the C, yield and optimization of
lighthydrocarbonrecoveryunitwithDHXprocess
ZhangJidong,MengShuo,ZhangHaibin,LuDi
CNOOC Energy Conseruation & Polltution Monitor Center, Tianjin, China
Abstract: The influencing factors of C yield were analyzed on a domestic 1 200 X 1o3 m*/d light hydrocarbon recovery unit with direct heat exchange (DHX) process, Under the condition of existing equipment, the simulation was done by Aspen HYSYS.The sensitivity of the key parameters was analyzed, which weighed the relationship between Cs yield and energy consumption. According to the analysis results，some conclusions were obtained:the optimum operating temperature was42C for low temperature separator, the optimum operating temperature was -7o C for the reflux of DHX tower. Furthermore, the expansion ratio of expander is a key factor to affect the yield of Cs, but it is unfavorable to adjust the expansion ratio of expander without new feed gas compressor or outlet natural gas compressor. The main reason of temperature fluctuation, pipeline effusion, even cut-out of C, tower was found by the calculation of the pipeline from C, tower to DHX tower. Based on the results of the above analysis, three measures were proposed to improve the Cs yield, which included increasing the heat exchanger area to reduce the operating temperature of low temperature separator,
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作者简介：张继东（1989一），吉林磐石人，工程师，2014年毕业于中国石油大学（北京）化学工程专业，硕士，现就职于中国海洋石油总公司节能减排监测中心有限公司，从事石油石化领域的节能减排技术研究、炼油化工装置的模拟与优化工作。E-mail： zhangjd13@cnooc. com. cn
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