石油炼制与化工 ›› 2015, Vol. 46 ›› Issue (6): 68-73.

• 基础研究 • 上一篇    下一篇

纤维液膜接触器内复配型溶剂高效脱除液化气中有机硫

张峰,沈本贤,孙辉,刘纪昌   

  1. 华东理工大学化学工程联合国家重点实验室
  • 收稿日期:2014-11-28 修回日期:2015-01-02 出版日期:2015-06-12 发布日期:2015-05-26
  • 通讯作者: 沈本贤 E-mail:sbx@ecust.edu.cn
  • 基金资助:
    十二五国家科技重大专项课题“大型油气田及煤层气开发”;中央高校基本科研业务费专项资金资助项目;中国石油化工股份有限公司“十条龙”科技攻关项目

FORMULATED SOLVENT FOR ORGANOSULFURS REMOVAL FROM LPG IN FIBER FILM CONTACTOR

  • Received:2014-11-28 Revised:2015-01-02 Online:2015-06-12 Published:2015-05-26
  • Contact: Benxian Shen E-mail:sbx@ecust.edu.cn

摘要: 对比纤维液膜接触器与筛板塔的传质面积、N-甲基二乙醇胺(MDEA)与4种复配型溶剂(UDS-I,UDS-II,UDS-III,UDS-IV)对有机硫的溶解性能,并在纤维液膜接触器内考察操作条件对优选溶剂脱硫效果的影响。结果表明:在纤维液膜接触器内以UDS-IV为优选溶剂脱除液化气中的硫化物,可从提高传质面积、传质推动力等方面提高有机硫传质速率,从而提高有机硫脱除率;UDS-IV溶剂对总有机硫的脱除率较MDEA高45.7百分点,总有机硫在UDS-IV溶剂-液化气体系的分配比较MDEA-液化气体系增加6~9倍;在优化的工艺条件下,UDS-IV溶剂可将焦化液化气的H2S和总硫分别脱除至1 mg/m3和240 mg/m3以下,总有机硫脱除率高达92%以上。

关键词: 液化气 , 脱硫溶剂, 有机硫, 甲硫醇, 羰基硫, 纤维液膜接触器

Abstract: The mass transfer areas of the fiber liquid film contactor and the sieve plate tower, and the solubility for organosulfurs of N-methyldiethanolamine (MDEA) and formulated solvents (UDS-I, UDS-II, UDS-III, UDS-IV) were compared. In addition, the influence of operation conditions on the desulfurization performance of the preferred formulated solvent UDS-IV was investigated. The results indicate that the UDS-IV with improved mass transfer area and driving force can increase the remove rate of organic sulfur from LPG in a fiber liquid film contactor. The removal rate of total organosulfur of UDS-IV solvent is approximately 46 % higher than that of MDEA. Meanwhile, the distribution ratios of organosulfurs in UDS-IV solvent-LPG system are found 7-10 times as much as those in MDEA-LPG system. Under optimum operation conditions, UDS-IV solvent can reduce the contents of H2S and total sulfur of the LPG to less than 1 and 240 mg?m-3, respectively, and the removal efficiency for total organosulfur is above 93%. Key Words: liquefied petroleum gas; desulfurization solvent; organosulfur; methyl mercaptan; carbonyl sulfide; fiber liquid film contactor

Key words: liquiefied petroleum gas, desulfurization solvent, organosulfur, methyl mercaptan, carbonyl sulfide, fiber film contactor