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| LNG原料气深度脱硫脱碳技术研究 |
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周永阳1,2,3, 黄黎明1,2,3, 何金龙1,2,3, 彭修军1,2,3
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1.中国石油西南油气田公司天然气研究院;2.国家能源高含硫气藏开采研发中心;3.中国石油天然气集团公司高含硫气藏开采先导试验基地
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| 摘要: |
| 天然气在液化过程中需深冷至约-162 ℃,为了避免在低温液化过程中因结冰堵塞设备和管线,需对天然气中的酸性组分进行深度脱除。介绍了LNG工厂中原料天然气预处理工艺中的重点单元—脱硫脱碳单元的技术路线,阐述了中国石油西南油气田公司天然气研究院自主研发的CT8-23活化MDEA溶剂及CT8-25深度脱硫脱碳脱有机硫溶剂的性能及技术特点,并与国外同类溶剂Sulfinol-D的性能进行了对比。结果 表明,在吸收压力仅为2 MPa、吸收塔塔板数为13块的条件下,CT8-25溶剂对H2S、CO2均可达到深度脱除的要求,且对有机硫的脱除率高出Sulfinol-D约28%。 |
| 关键词: LNG 脱硫 脱碳 脱有机硫 CT8-23 CT8-25 |
| DOI：10.3969/j.issn.1007-3426.2014.03.003 |
| 分类号:TE644 |
| 基金项目:中国石油天然气股份有限公司重大专项“天然气液化关键技术研究”专题一“天然气深度预处理工艺技术研究”(2009E-1901)。 |
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| Researsh on deep desulfurization and decarbonization technology of LNG feed gas |
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Zhou Yongyang1,2,3, Huang Liming1,2,3, He Jinlong1,2,3, Peng Xiujun1,2,3
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1.Research Institute of Natural Gas Technology, PetroChina Southwest Oil & Gasfield Company, Chengdu 610213, Sichuan, China;2.National Energy R&D Center of High Sulfur Gas Exploitation, Chengdu 610213, Sichuan, China;3.High Sulfur Gas Exploitation Pilot Test Center, CNPC, Chengdu 610213, Sichuan, China
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| Abstract: |
| It is necessary to cool natural gas to about -162 ℃ during the liquefaction process. In order to avoid freezing plugging of the equipment and pipelines during the cryogenic liquefaction process, the acidic components of natural gas should be removed deeply. The key process technology of feed gas pretreatment unit for LNG plant, which includes desulfurization and decarbonization is mainly introduced. The characteristics and technical advantages of CT8-23 activated MDEA solvent and CT8-25 solvent, which can deeply remove the H2S, CO2 and organic sulfur, are described. Both of the solvents have been developed independently by Research Institute of Natural Gas Technology, PetroChina Southwest Oil & Gasfield Company. Compared to similar foreign solvents Sulfinol-D, the results show that CT8-25 solvent can removal H2S,CO2 deeply to reach the requirements. When the absorption pressure is 2 MPa, the plate number of absorber is 13, and the removal rate of organic sulfur is 28% higher than Sulfinol-D. |
| Key words: LNG desulfurization decarbonization organic sulfur removal CT8-23 CT8-25 |
