位阻胺选择性脱硫配方溶剂（CT8-16）脱除天然气中H2S、CO2现场应用试验

Field Application of Sterical Hindrance Amine Formula Sweetening Solvent （CT8-16） on Selective Removal of H2S and CO2 from Natural Gas

关键词:  位阻胺  选择性  脱硫配方溶剂  天然气  硫化氢  二氧化碳

Key words:  sterical hindrance amine  selective desulfurization  formulated solvent  natural gas  hydrogen sulfide  carbon dioxide

摘要:

在处理量1×104m3/d的脱硫装置上,对室内研制的位阻胺选择性脱硫配方溶剂(CT8-16)进行了较长时间的试验和运转。考察了溶剂在不同填料高度、不同气液比、不同贫液入塔温度等条件下的吸收和再生性能,以及溶剂对碳钢的腐蚀性和抗发泡性能,并进一步优化了工艺操作参数。试验结果表明,经该位阻胺选择性脱硫配方溶剂处理后,净化气H2S含量较甲基二乙醇胺溶剂(MDEA)低29%以上,而在净化气H2S含量相当时,CO2脱除率则比MDEA低14.5个百分点。该脱硫溶剂对碳钢腐蚀速率低;试验过程中装置运行平稳,未见发泡迹象,具有较强的抗发泡能力。本次现场应用试验所取得的结果为该溶剂工业推广应用提供了重要的依据。

Abstract:

Sterical hindrance amine CT8-16 formula solvent has been tested and run a long time on the 1×104 m3/d sweetening unit. It has investigated absorption and regeneration performance of the solvent under the condition of different packing height,different gas–liquid ratio and different temperature of lean liquor into tower etc.,and the corrosion on carbon steel and anti-foaming performance are investigated,and process parameters are optimized furtherly. Test results show that concentration of H2S in treated natural gas by CT8-16 formula solvent is lower above 29 percent than treated by MDEA. When H2S content in treated gas is the same,removal rate of CO2 treated by CT8-16 is lower 14.5 percent than that of MDEA. The corrosion rate of the CT8-16 solvent on carbon steel is low,and the testing unit using the solvent run smoothly without foam ing,and has strong anti-foaming capacity. The application test results provide an important basis for industrial application.