络合铁脱硫溶液体系草酸亚铁生成机理探讨
Exploration on the formation mechanism of ferrous oxalate in complex iron desulfurization solution system
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- 引用格式:
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朱洪林,周斯雅,李,涛,高,阳.络合铁脱硫溶液体系草酸亚铁生成机理探讨[J].天然气与石油,2025,43(4):26-31.doi:10.3969/j.issn.1006-5539.2025.04.004
ZHU Honglin, ZHOU Siya, LI Tao, GAO Yang.Exploration on the formation mechanism of ferrous oxalate in complex iron desulfurization solution system[J].Natural Gas and Oil,2025,43(4):26-31.doi:10.3969/j.issn.1006-5539.2025.04.004
- DOI:
- 10.3969/j.issn.1006-5539.2025.04.004
- 作者:
- 朱洪林 周斯雅 李 涛 高 阳
ZHU Honglin, ZHOU Siya, LI Tao, GAO Yang
- 作者单位:
- 中国石油西南油气田公司川中油气矿, 四川 遂宁 629001
Chuanzhong Oil and Gas District, PetroChina Southwest Oil & Gasfield Company, Suining, Sichuan, 629001, China
- 关键词:
- 络合铁脱硫;络合物降解;草酸亚铁;生成机理
Complex iron desulfurization; Complex degradation; Ferrous oxalate; Formation mechanism
- 摘要:
- 某在役双塔流程络合铁脱硫装置的吸收塔富液出塔管线内壁上,发现了大量结构紧密的坚固堵塞物,为降低或消除堵塞物对装置正常运行的影响,有必要弄清堵塞物的组分和生成机理,并制定相应的控制措施。通过分析射线衍射谱图、晶体结构、元素含量，明确堵塞物的性质及特征组成,在查阅相关文献的基础上,通过分析研究、实验验证,确定络合铁脱硫溶液体系草酸亚铁生成机理,并提出有针对性的控制措施，包括调整合理的溶液pH值、控制Fe3+浓度、控制再生空气量、加入羟基自由基清除剂、优化络合铁溶液配方等。通过在络合铁脱硫装置生产运行中运用提出的控制措施,有效控制了系统溶液的降解和草酸液体的生成,降低了堵塞物的生成速度。研究结果能降低络合铁装置的运行成本。
A large number of densely structured solid blockages were found on the inner wall of the rich liquid outlet pipeline of the absorption tower in a double-tower process complex iron desulfurization unit in service. In order to eliminate or reduce the influence of blockages on the normal operation of the unit, it is necessary to clarify the composition and formation mechanism of the blockages and to develop corresponding control measures. The properties and characteristic components of the blockages were identified using X-ray diffraction pattern analysis, crystal structure analysis, elemental content analysis. Based on a review of relevant literature, the formation mechanism of ferrous oxalate in the complex iron desulfurization solution system was determined through analytical study and experimental verification and targeted control measures were also put forward, including adjusting the solution's pH to an appropriate range, controlling the concentration of Fe3+, controlling regenerated air volume and adding free radical scavengers. The control measures developed according to this mechanism were applied to the production and operation of the complex iron desulfurization unit, which effectively controlled the degradation of the system solution and the formation of oxalic acid liquid, thereby reducing the rate of blockage formation. Research results indicate that adjusting the solution's pH value and optimizing complex iron solution formulation can reduce the operating cost of the complex iron desulfurization unit.
