石油与天然气化工2025，Vol.54Issue(4)：29-35,7.DOI:10.3969/j.issn.1007-3426.2025.04.004
天然气净化厂SCOT尾气处理装置运行及优化
Operation and optimization of SCOT tail gas treatment unit in natural gas purification plant
罗威 1王敏 1龙德林 1丁大林 1庞增诚 1杨斌1
作者信息
- 1. 中国石油西南油气田公司川中油气矿磨溪天然气净化厂
- 折叠
摘要
Abstract
Objective There are two sets of sulfur recovery units in the Moxi Natural Gas Purification Plant of the Central Sichuan Oil and Gas District,PetroChina Southwest Oil&Gasfield Company,MCRC and CPS processes are used respectively,and the sulfur recovery rate is 99.0%and 99.2%,respectively.It is necessary to further improve the sulfur recovery rate of the units so that the mass concentration of SO2 in the discharged flue gas can meet the requirements of the GB 39728-2020Emission standard of air pollutants for onshore oil and gas exploitation and production industry.Method Based on the existing sulfur recovery units,a new set of SCOT tail gas treatment unit was built.Combined with the trial operation of the unit,the key problems affecting the operation stability of the unit,the total sulfur recovery rate and the full-time compliance of pollutants discharge were analyzed.The modification and optimization measures were summarized for the problems of leakage between the tube side and the shell side of the hydrogenation reactor waste heat boiler and the frequent blocking of the regeneration tower.Result The performance evaluation results of the newly built SCOT tail gas treatment unit showed that the total sulfur recovery rate of the unit reached 99.96%,the SO2 conversion rate of the hydrogenation catalyst was not less than 99.9%,the organic sulfur hydrolysis rate of the hydrogenation catalyst was about 93.4%,the average mass concentration of SO2 in the discharged flue gas was 164.2 mg/m3,and the average mass concentration of H2S in the lean liquid was 0.14 g/L.The evaluation results were better than the design values.Conclusion The new tail gas treatment unit runs smoothly and can provide a reference for similar units.关键词
天然气净化厂/硫磺回收/尾气处理/达标排放/MCRC/CPS/SCOT/除硫Key words
natural gas purification plant/sulfur recovery/tail gas treatment/up-to-standard emission/MCRC/CPS/SCOT/sulfur removal引用本文复制引用
罗威,王敏,龙德林,丁大林,庞增诚,杨斌..天然气净化厂SCOT尾气处理装置运行及优化[J].石油与天然气化工,2025,54(4):29-35,7.
