| 摘要: |
| 目的 在GB 39728-2020《陆上石油天然气开采工业大气污染物排放标准》和GB 31570-2015《石油炼制工业污染物排放标准》对排放尾气中SO2质量浓度做出严格规定的背景下,对含硫尾气达标处理工艺进行国产化替代。方法 研发了具有自主知识产权的尾气氧化吸收溶剂CT8-27,通过室内试验对其脱硫性能进行了评价,并从分布系数δ入手,通过离子形态分布图对溶剂的脱硫性能及选择性进行了机理研究。结果 通过评价数据可知,采用CT8-27对SO2含量较高的尾气进行脱除后,净化尾气中SO2质量浓度降至24.9 mg/m3以下,同时,对CO2的共吸收率＜10%。此外,还确定了影响溶剂体系脱硫性能和选择性的关键因素是合理的pH值。结论 尾气氧化吸收溶剂CT8-27的脱硫性能与进口溶剂相当,且表现出良好的吸收选择性,可实现进口溶剂的国产替代。 |
| 关键词: 尾气脱硫 硫磺回收 氧化吸收 二氧化硫 选择性 分布系数 达标排放 |
| DOI：10.3969/j.issn.1007-3426.2024.02.005 |
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| 基金项目: |
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| Development of oxidation absorption solvent for containing sulfur dioxide tail gas in sulfur recovery unit |
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LIU Ke1, YUAN Xiaojin2, CHEN Tingku3, DUAN Ting1, CHEN Guanshan1
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1. Research Institute of Natural Gas Technology, PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan, China;2. Northwest Sichuan Gas District, PetroChina Southwest Oil & Gasfield Company, Jiangyou, Sichuan, China;3. Natural Gas Purification Plant General, PetroChina Southwest Oil & Gasfield Company, Chongqing, China
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| Abstract: |
| Objective Under the background of GB 39728-2020 Emission standard of air pollutants for onshore oil and gas exploitation and production industry and GB 31570-2015 Emission standard of pollutants for petroleum refining industry, the SO2 mass concentration in emission tail gas is strictly regulated, and the domestication substitution is carried out for the treatment process of tail gas containing-sulfur dioxide. Methods A tail gas oxidation absorption solvent CT8-27 with independent intellectual property rights was developed, and its desulfurization performance was evaluated through indoor experiments. Through ion morphology distribution maps, the distribution coefficient δ was introduced to evaluate the desulfurization performance and selectivity of the solvent. Results Based on the evaluation data, it can be seen that after the tail gas with high SO2 content was removed by CT8-27, the mass concentration of SO2 in the purified tail gas was reduced to less than 24.9 mg/m3, and the co-absorptirity of CO2 was less than 10%. In addition, it was determined that the key factor affecting the desulfurization performance and selectivity of the solvent system was reasonable pH value. Conclusion sThe desulfurization performance of tail gas oxidation absorption solvent CT8-27 is comparable to that of imported solvents, and it shows good absorption selectivity, which can realize the domestication substitution of the imported solvent. |
| Key words: tail gas desulfurization sulfur recovery oxidative absorption sulfur dioxide selectivity distribution coefficient up-to-standard emission |
