【摘要】 介绍华东理工大学自主研发UDS复合脱硫溶剂及UDS净化高酸性天然气工业应用研究,并对闪蒸气吸收塔操作不稳定的工程问题进行水力学核算。工业应用结果表明,UDS溶剂在有效脱除H₂S和CO₂的同时能够高效脱除羰基硫（COS）等有机硫,当原料气中H₂S,CO₂体积分数和总有机硫质量浓度依次为15.88%,8.54%和390.83 mg/m³时在吸收压力为8.3 MPa、温度为40℃、气液体积比为230的条件下,净化气中H₂S质量浓度小于1 mg/m³、总硫质量浓度小于3.5 mg/m³,净化气质量优于一类气指标,一级吸收COS脱除率较相同条件下的N-甲基二乙醇胺（MDEA）溶剂装置高出13百分点。水力学计算结果表明,散堆填料段的水力学性能是影响闪蒸气吸收塔操作稳定性的关键,当闪蒸气流量为1 200 kg/h时,泛点率达到110.09%。将闪蒸气吸收塔塔径由500 mm改造为600 mm,消除了液泛风险,实现了工业净化装置的安全平稳运行。更多还原

【Abstract】 The UDS solvent for desulfurization and UDS process for purification of highly sour natural gas developed by East China University of Science & Technology are introduced.In addition,the hydraulic performance of the flash steam absorption tower are calculated and analyzed.The results of commercial application indicate that the UDS solvent shows not only the perfect removal performance for H₂S and CO₂ but also high removal efficiency for organic sulfurs such as COS,etc.The contents of H₂S and total sulfur are below 1mg/m³ and 3.5 mg/m³ in purified gas when the content of H₂S and CO₂ in feed gas is as high as 15.88%and8.54%respectively under the conditions of 8.3 MPa pressure,40 ℃ temperature and Vg/Vl ratio of 230.As the result,the quality of purified natural gas meets the first class standard.The COS removal rate of UDS solvent is 13%higher than that of MDEA solvent for the first-stage absorption.In addition,the hydraulic calculation results show that the operation of the flash steam absorption tower is mainly determined by the hydraulic behavior of the random packing section.When the flash steam flowrate is 1 200 kg/h,the flooding point rate reaches up to 110.09%.Based upon the hydraulic calculation results,the tower diameter is increased from500 mm to 600 mm and the liquid flooding problem is successfully solved,and the purification unit has been operating safely and reliably ever since.更多还原