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高选择性位阻胺脱硫剂试用研究
Trial study of high selective steric hindrance amine desulfurizer
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- DOI:
- 作者:
- 李 晶，张宁峰，李振刚，姜 磊
Li Jing，Zhang Ningfeng，Li Zhengang，Jiang Lei
- 作者单位:
- 中国石油宁夏石化公司，宁夏 银川 750026
PetroChina Ningxia Petrochemical Company，Yinchuan 750026，China
- 关键词:
- 位阻胺；溶剂选择性；滑脱率；硫磺回收
PetroChina Ningxia Petrochemical Company，Yinchuan 750026，China
- 摘要:
- 摘要：某石化公司溶剂再生装置脱硫溶剂采用MDEA溶剂，其选择性稍差，吸收H2S的同时吸收大量的CO2，溶剂再生酸性气中CO2浓度高达70%，造成下游硫磺回收装置出现诸多生产问题。对此，该公司参考同类装置，最终决定采用含位阻胺溶剂来提高溶剂再生装置胺液选择性，降低脱硫过程胺液对CO2的吸收率，从而降低再生酸性气量，提高酸性气中H2S占比，确保硫磺装置稳定运行。通过测试，加入位阻胺成分后溶剂较之未加入前 CO2滑脱率提升超过20%，提升了溶剂再生装置系统内溶剂质量。Abstract: MDEA solvent with poor selectivity was used as the desulfurizing solvent in the solvent recycling plant of a petrochemicalcompany which absorbed H2S and a large amount of CO2, led to the CO2 concentration in the solvent recycling acid gas up to 70%that resulted in some production problems to downstream sulfur recovery plant. Therefore, referred to the similar plants,the companyfinally decided to use a steric amine solvent to improve the selectivity of the amine solution of the solvent regeneration plant,reduced the absorption rate of CO2 of the amine solution in the desulfurization process, thereby reducing the acidic gas volume of theregeneration, increasing the proportion of H2S in the acidic gas, and ensuring the stable operation of the sulfur plant. Through thetest, the CO2 slippage rate of the solvent increased by more than 20% after the addition of steric amine, which improved the solventquality in the solvent regenerator system.