天然气与石油2025，Vol.43Issue(4)：26-31,6.DOI:10.3969/j.issn.1006-5539.2025.04.004
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
摘要
Abstract
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.关键词
络合铁脱硫/络合物降解/草酸亚铁/生成机理Key words
Complex iron desulfurization/Complex degradation/Ferrous oxalate/Formation mechanism引用本文复制引用
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):26-31,6.基金项目
中国石油西南油气田公司科研项目"液相氧化脱硫技术在高压含硫气井试采中的应用研究"(20220306-07) （20220306-07）
