摘要
针对近年来天然气中酸性组分含量升高导致的产品气气质下降、设备故障频繁等问题,利用Aspen HYSYS软件对MDEA溶液循环量提高后的脱硫系统进行了流程模拟。结果表明,当原料气中酸性组分CO2和H2S的体积分数分别由5.280%和0.028%增至6.280%和0.052%时,为了保证产品气符合国家标准,需将系统中的MDEA溶液循环量由63.25m3/h逐渐提高至102.85m3/h。使用Tray Rating、HTRI Xchanger Suite软件对不同MDEA溶液循环量下的塔器和换热器等重要设备进行了一系列优化。经计算,胺液吸收塔和再生塔的流体力学性能均符合要求;胺液贫富液换热器在MDEA溶液循环量提高时可串联1台同型号换热器,同时更换换热管规格,以满足系统需要并缓解堵塞;优化后的二级闪蒸装置能够较大程度地缓解装置频繁波动的情况,而在其入口处加装高效波纹板除沫器则可有效避免系统发泡。
Aiming at the inferior product gas quality and frequent equipment troubles due to the increase of acidic components content in natural gas in recent years,the process of desulphurization system after the increase of MDEA solution circulation flow rate was simulated by Aspen HYSYS software.The simulation result demonstrated that it was necessary to increase MDEA solution volume flow rate gradually from 63.25m^3/h to 102.85m^3/h to satisfy national standards when the volume fraction of CO2 and H2S was increased from 5.280% and 0.028%to 6.280%and 0.052%respectively.Key facilities were implemented a series of optimization by the professional softwares of FRI-Tray Rating,and HTRI Xchanger Suite,etc.The fluid mechanics performance of amine absorber and regenerator were qualified for different volume flow rates of MDEA solution after calculation.When the volume flow rates increased,it was feasible schemes to add the same model of lean/rich amine heat exchanger in series and simultaneously change the specification of heat exchange tube to meet the demand and resolve block.Optimized two-level flash device could greatly relieve frequent fluctuation and fixing the high-efficiency corrugated plate demister at inlet could avoid system foaming.
出处
《石油与天然气化工》
CAS
CSCD
2014年第5期467-471,477,共6页
Chemical engineering of oil & gas
基金
西安市科技计划项目"智能数字管理技术开发"(CXY1345(6))
西安石油大学青年科技创新基金项目"靖边气田天然气净化装置模拟与优化研究"(2012BS003)
